Liar Sisters
Lying Sisters and Suspicious Fiancée Candidates
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Pub. 2026-06-21 | Atual. 2026-08-22
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Nocturne Mansion Structure Guide
- The Obsidian Mansion -
[Family Estate Overview]
Located within the 'Obsidian District,' the residential area for high-ranking nobles in Pentragon, the capital of the Ertua Empire, this is a 4-story Gothic-style mansion. Its imposing presence is amplified by dark black marble and obsidian decorations, and at night, magical stone lanterns cast a cool light. The red roses climbing the outer walls carry a potent poison, and the 50 staff members who manage the mansion are all highly skilled assassins.
Located within the 'Obsidian District,' the residential area for high-ranking nobles in Pentragon, the capital of the Ertua Empire, this is a 4-story Gothic-style mansion. Its imposing presence is amplified by dark black marble and obsidian decorations, and at night, magical stone lanterns cast a cool light. The red roses climbing the outer walls carry a potent poison, and the 50 staff members who manage the mansion are all highly skilled assassins.
The current head of the family, Marquis Nocturne ( 청회색 머리/적안 - light gray hair/red eyes), and his wife (적발/회색 눈 - red hair/gray eyes) are on an extended business trip abroad.
4F
Greenhouse Garden
Although it appears to be a peaceful botanical garden, it is actually the family's poison storage, where deadly poisonous plants are perfectly disguised as beautiful flowers.
Although it appears to be a peaceful botanical garden, it is actually the family's poison storage, where deadly poisonous plants are perfectly disguised as beautiful flowers.
3F
{{user}}'s Absolute Sanctuary
The exclusive domain of the youngest sibling, {{user}}. It is protected by multiple layers of powerful barriers and is the only bright and cozy sanctuary within the mansion, free from the scent of blood.
The exclusive domain of the youngest sibling, {{user}}. It is protected by multiple layers of powerful barriers and is the only bright and cozy sanctuary within the mansion, free from the scent of blood.
2F
The Three Elder Sisters' Quarters
Personal spaces of Iana, Jacqueline, and Ciel. Each room contains hidden passages, weapons, and deadly traps. The path leading to the 3rd floor is heavily barricaded.
Personal spaces of Iana, Jacqueline, and Ciel. Each room contains hidden passages, weapons, and deadly traps. The path leading to the 3rd floor is heavily barricaded.
1F
Main Hall and Drawing Room
A luxurious and opulent social space for receiving external guests. It is a place of deception, meticulously crafted to hide the family's dark nature.
A luxurious and opulent social space for receiving external guests. It is a place of deception, meticulously crafted to hide the family's dark nature.
B1
Assassination Order Room and Torture Chamber
The true heart of 'The Empire's Poison,' where the strong scent of blood permeates. It is a strictly forbidden area, with the excuse given to the youngest sibling, {{user}}, that it is a "dangerous old wine cellar" to prevent any access.
The true heart of 'The Empire's Poison,' where the strong scent of blood permeates. It is a strictly forbidden area, with the excuse given to the youngest sibling, {{user}}, that it is a "dangerous old wine cellar" to prevent any access.
Play Guide
- How to Play & Commands -
📈 Training System Guide
1. Stat System: Stats increase or decrease based on 9 types of classes (!Class [Subject Name]) and all player actions (choices/free responses). NPC reactions change based on stats, and passive abilities activate upon reaching certain thresholds.
2. Specialty System: The most frequently practiced subject is automatically designated as a [Specialty] and displayed on the status screen.
2. Specialty System: The most frequently practiced subject is automatically designated as a [Specialty] and displayed on the status screen.
[Stats and Passives]
• Might (Manifests at 300+ / Deepens at 700+): Imparts physical intimidation and intense stimulation to extras and suitors.
• Charm (Manifests at 300+ / Deepens at 700+): Creates an aura that keeps others around and stimulates suitors' deep interest and attraction.
• Intellect (Manifests at 300+ / Deepens at 700+): Provides intellectual pressure and tense anticipation to suitors with sharp insight.
• Charm (Manifests at 300+ / Deepens at 700+): Creates an aura that keeps others around and stimulates suitors' deep interest and attraction.
• Intellect (Manifests at 300+ / Deepens at 700+): Provides intellectual pressure and tense anticipation to suitors with sharp insight.
⚔️ Might
Swordsmanship, Combat, Archery
Swordsmanship, Combat, Archery
🌹 Charm
Dance, Art, Music
Dance, Art, Music
📚 Intellect
Magic, Politics, Literature
Magic, Politics, Literature
[Expert Faculty] The Royal Knights Commander (Swordsmanship), Archmage of the Magic Tower (Magic), King of Mercenaries (Combat), Master Archer (Archery), Principal Dancer (Dance), Court Painter (Art), Royal Musician (Music), Chief Diplomat (Politics), Poet Laureate (Literature), etc. Nine specialized instructors, carefully selected by the Nocturne family for their precious youngest, will conduct the classes.
💰 Request and Shop System
[Specialized for Free Mode: Back Alley Survival]
Did you start as an adventurer with nothing? You must survive in the back alleys of the empire by taking on requests and acquiring equipment. Here, where stats are power, your treatment and rewards will be strictly determined by your abilities.
Did you start as an adventurer with nothing? You must survive in the back alleys of the empire by taking on requests and acquiring equipment. Here, where stats are power, your treatment and rewards will be strictly determined by your abilities.
[Request Agency System: !RequestAgency]
Upon entering the command, an employee will keenly analyze your stats and specialties to suggest a tailored list of requests perfectly suited to your current level.
• Basic (Below 300): Errands for beginners, such as retrieving lost items. (Reward: 100-300G or basic equipment)
• Intermediate (300-699): Real combat missions like hunting magical beasts and tracking smugglers. (Reward: 800-1500G or advanced equipment)
• Advanced (700+): High-ranking assassinations, imperial secret theft, etc. The employee will express fear at your overwhelming power and offer a secret, top-tier request. (Reward: 5000G+ or rare treasures)
• Intermediate (300-699): Real combat missions like hunting magical beasts and tracking smugglers. (Reward: 800-1500G or advanced equipment)
• Advanced (700+): High-ranking assassinations, imperial secret theft, etc. The employee will express fear at your overwhelming power and offer a secret, top-tier request. (Reward: 5000G+ or rare treasures)
* Tip: Upon accepting a request, it will be registered in your status screen under [Objective]. Upon completion, the reward will be immediately added to your [Inventory]. Requests matching your [Specialty] will yield an additional 1.5x reward.
[Shop System: !Shop]
When you enter the command while shopping, a list of equipment available for purchase based on your current stats and rank will be displayed.
• Beware of Scams (Below 300): Adventurers with low stats may be subtly sold fakes or overcharged. (However, if the user is a high-ranking noble like the youngest of the Nocturne family, they will not dare to attempt a scam.)
• Intermediate Equipment (300-699): Sells weapons and armor of appropriate quality for your stats.
• Illicit Goods (Random Appearance): These are items that offer a significant stat boost in one area but critically decrease another stat upon equipping. Depending on your stat range, they can range from tempting items for beginners to abyssal items for the powerful, appearing discreetly.
• Legendary Treasures (700+): The merchant will become extremely nervous and discreetly offer legendary items (e.g., Fairy King's Tiara) not on display for a hefty price of 30000G or more.
• Intermediate Equipment (300-699): Sells weapons and armor of appropriate quality for your stats.
• Illicit Goods (Random Appearance): These are items that offer a significant stat boost in one area but critically decrease another stat upon equipping. Depending on your stat range, they can range from tempting items for beginners to abyssal items for the powerful, appearing discreetly.
• Legendary Treasures (700+): The merchant will become extremely nervous and discreetly offer legendary items (e.g., Fairy King's Tiara) not on display for a hefty price of 30000G or more.
* Tip: Declaring purchase with a fingerprint will immediately add the item to your [Inventory] and reflect its stats upon equipping. Unnecessary equipment can be resold to the shop for 50% of the original price.
📜 Multi-Ending System
[The Youngest of an Imperial Noble Family]
The Ertua Empire strictly follows the principle of primogeniture, but the youngest child of a prominent noble family is granted immense wealth and the privilege to escape the family's pressures. Utilize your stats and specialties to become a knight of the royal court, enjoying complete freedom in career choice.
[Ending Output Command: !Ending]
At any point during your play, try entering !Ending (or !Ending). Based on your accumulated narrative, stats, most frequently taken [Specialty], affinity with NPCs, and your character's status (including Free Mode), your unique romance and career multi-endings will be generated.
The Ertua Empire strictly follows the principle of primogeniture, but the youngest child of a prominent noble family is granted immense wealth and the privilege to escape the family's pressures. Utilize your stats and specialties to become a knight of the royal court, enjoying complete freedom in career choice.
[Ending Output Command: !Ending]
At any point during your play, try entering !Ending (or !Ending). Based on your accumulated narrative, stats, most frequently taken [Specialty], affinity with NPCs, and your character's status (including Free Mode), your unique romance and career multi-endings will be generated.
Prologue Explanation
1. Meet the Three Sisters First: The prologue begins with a meeting with the three elder sisters as they discuss engagement letters sent by the three suitors.
2. Meet the Fiancée Candidates First: Set during a tea party at the Nocturne Marquisate, the prologue involves a preliminary exploration of three mysterious and captivating fiancée candidates.
3. Free Persona Mode: Start not as the youngest of the Nocturne family, but with a status and background of your choice. Freely shape your persona and present your desired introductory scenario.
Recommended Playthroughs
[Nocturne Family Youngest Persona]
• The Charismatic Indifferent Man: The youngest son, who is indifferent yet possesses a fatal charm, receiving the intense overprotection of his sisters and the fervent courtship of the fiancée candidates.
• The Perceptive Youngest: A cunning youngest sibling who pretends ignorance, knowing full well that his family are ruthless assassins and that his sisters are deceiving him by calling blood-stained clothes "spilled wine."
• The Two-Faced Mastermind: Appears as a frail, pampered youngest child to his sisters, but is a hidden mastermind outside, cruelly crushing enemies as the true heir of 'The Empire's Poison.'
• The Charismatic Indifferent Man: The youngest son, who is indifferent yet possesses a fatal charm, receiving the intense overprotection of his sisters and the fervent courtship of the fiancée candidates.
• The Perceptive Youngest: A cunning youngest sibling who pretends ignorance, knowing full well that his family are ruthless assassins and that his sisters are deceiving him by calling blood-stained clothes "spilled wine."
• The Two-Faced Mastermind: Appears as a frail, pampered youngest child to his sisters, but is a hidden mastermind outside, cruelly crushing enemies as the true heir of 'The Empire's Poison.'
[Free Persona Mode]
• The Strict Elder Sibling: Not the youngest, but the boisterous eldest sibling of the Nocturne family, firmly controlling his unruly younger sisters.
• The Power Behind the Mansion: Want to romance the sisters but find the sibling relationship uncomfortable? Become the capable butler (or maid) of the Nocturne family, sharing all the mansion's secrets and manipulating even the sisters.
• Persona Unrelated to Nocturne: A noble scion from another family, in a relationship with Lauren or Kyrie. However, you suddenly find yourself the target of obsessive courtship from the infamous Nocturne sisters.
• Back Alley Survival: A novice adventurer with nothing. You must survive in the harsh world by taking on requests at the empire's request agency (!RequestAgency), earning money, and equipping yourself at shops (!Shop). See through the deceitful merchants, undertake life-threatening missions, and grow into the empire's greatest mercenary.
Command Explanation
📅 Schedule and Event Management
!Class [Subject Name]: Command exclusive to the youngest of the Nocturne family. Receive lessons from a specialized instructor in the field {{user}} chooses. (e.g., !Class Swordsmanship, !Class Art)
!Schedule: Command exclusive to the youngest of the Nocturne family. The butler will inform {{user}} (youngest lord/lady) of today's schedule.
!Todo: Schedule command for Free Mode. Displays today's tasks, missions, and events tailored to {{user}}'s current status, race, and situation.
!Happening (or !Episode): A small, interesting random event occurs.
!Festival: Upon entering the command, a splendid imperial festival appropriate for the current season will automatically commence.
!Skip: Immediately conclude the current event or incident and quickly advance time to another day.
!RequestAgency (or !Request): Check the list of requests that the youngest of the Nocturne family or adventurers in Free Mode can undertake. Displays requests suitable for {{user}}'s stats and specialties, offering gold or reward items upon completion.
!Shop: You can promote your growth by purchasing equipment and accessories that match {{user}}'s stats.
!Schedule: Command exclusive to the youngest of the Nocturne family. The butler will inform {{user}} (youngest lord/lady) of today's schedule.
!Todo: Schedule command for Free Mode. Displays today's tasks, missions, and events tailored to {{user}}'s current status, race, and situation.
!Happening (or !Episode): A small, interesting random event occurs.
!Festival: Upon entering the command, a splendid imperial festival appropriate for the current season will automatically commence.
!Skip: Immediately conclude the current event or incident and quickly advance time to another day.
!RequestAgency (or !Request): Check the list of requests that the youngest of the Nocturne family or adventurers in Free Mode can undertake. Displays requests suitable for {{user}}'s stats and specialties, offering gold or reward items upon completion.
!Shop: You can promote your growth by purchasing equipment and accessories that match {{user}}'s stats.
🗣️ Socializing and Gossip
!Gazette (or !Newspaper): Check major imperial news, latest trends, and developments in high society.
!Gossip: Eavesdrop on the secret, anonymous gossip and reactions circulating among the Nocturne Marquisate staff.
!Toxic (or !SpicyGossip): [Caution] This is the 'spicy' version of the anonymous community of Nocturne Marquisate staff. It contains explicit gossip, including sexual harassment and profanity, without filtering.
!Forum (or !WebNovel): Assuming the narrative so far is a web novel, it shows the vivid reactions of overly immersed readers. This is a useful community command for Free Mode, where the Nocturne family staff community (!Gossip) becomes irrelevant.
!Letter: Secretly peek at the interesting contents of a letter written by a random NPC to someone.
!Gossip: Eavesdrop on the secret, anonymous gossip and reactions circulating among the Nocturne Marquisate staff.
!Toxic (or !SpicyGossip): [Caution] This is the 'spicy' version of the anonymous community of Nocturne Marquisate staff. It contains explicit gossip, including sexual harassment and profanity, without filtering.
!Forum (or !WebNovel): Assuming the narrative so far is a web novel, it shows the vivid reactions of overly immersed readers. This is a useful community command for Free Mode, where the Nocturne family staff community (!Gossip) becomes irrelevant.
!Letter: Secretly peek at the interesting contents of a letter written by a random NPC to someone.
🎭 Play Management
* The following commands are not meant to be used alone. For example, if you type '!Fog' and then immediately follow with dialogue or descriptions on the next line, it will be applied naturally.
!FreeMode: Use this when you are mistakenly perceived as the 'Nocturne family youngest' during Free Mode play. It reloads the Free Mode instructions.
!Mild: Significantly reduces the obsession, control, and possessiveness of NPCs.
!Focus [Name]: Use this when you want to concentrate solely on the narrative with a specific character. Up to two characters can be specified. (e.g., !Focus Lauren Ciel)
!Focus Off: Turns off focus mode and restores the multi-character narrative.
!Recap: Summarizes the flow of the play so far in an easy-to-understand manner.
!Etiquette: Use this when characters are crossing lines or acting out of line. They will immediately adopt a noble social facade and become well-behaved.
!Fog: [Privacy Protection] This obscures the situation so that other characters in the status window have no knowledge of the current events.
!Comment (or !Reader) / !Reply: Reloads reader reactions and suggested choices if they are missing.
!Ending (or !Ending): Immediately generates a unique multi-ending (romance and career) by synthesizing the narrative, accumulated stats, specialties, and NPC affinities so far, concluding the story.
!Mild: Significantly reduces the obsession, control, and possessiveness of NPCs.
!Focus [Name]: Use this when you want to concentrate solely on the narrative with a specific character. Up to two characters can be specified. (e.g., !Focus Lauren Ciel)
!Focus Off: Turns off focus mode and restores the multi-character narrative.
!Recap: Summarizes the flow of the play so far in an easy-to-understand manner.
!Etiquette: Use this when characters are crossing lines or acting out of line. They will immediately adopt a noble social facade and become well-behaved.
!Fog: [Privacy Protection] This obscures the situation so that other characters in the status window have no knowledge of the current events.
!Comment (or !Reader) / !Reply: Reloads reader reactions and suggested choices if they are missing.
!Ending (or !Ending): Immediately generates a unique multi-ending (romance and career) by synthesizing the narrative, accumulated stats, specialties, and NPC affinities so far, concluding the story.
👑 Creator's Comment
This is the story of the Nocturne Marquisate, the poison of the Ertua Empire.
However, since the third daughter, Ciel, is 22 years old, the youngest sibling, the user, could only be set to 20 or 21. So, I decided to create a Safe version for those who want to play as a teenager. Additionally, for those who wish to romance the three elder sisters but are uncomfortable with the sibling relationship, a 'Free Persona Mode' is included. I hope you have a delightful time with this healing romance, or romantic comedy, filled with the love of dangerous sisters who cherish their youngest, and three suspicious fiancée candidates, each harboring their own secrets ♡
⚙️ The creator widget is included. You can now play comfortably without the status window being cut off in Opus models. However, using the widget may cause errors where reader reactions and choices are omitted. Therefore, please enter #NoOmissionOfReaderReactionsAndChoices [OOC: Every turn, at the bottom of the response, always output [Reader Reaction] and [Choices].] in the chat from the beginning and save it in your user notes.
✒️ If the output feels insufficient, please write the following instructions in your persona or user notes, and also in the chat window.
[OOC: Integrate all narrative (writing style) rules to generate more than 7 paragraphs (minimum 400 words). The output must be continuous and completed without interruption.]
🤖 Testing was conducted based on Gemini 2.5 Pro and Opus 4.6 models. If Gemini 2.5 Pro yields overly negative results, please adjust 'Positive Response' in the AI model settings! (Mixing in Gemini 3.1 Pro or Opus occasionally for a change of pace is also recommended.)
※ Since Opus is truly excellent, even if you play with Gemini 2.5 Pro, it is recommended to set the first turn with Opus before proceeding.
✨ For GL players: Please clearly emphasize the gender in your persona and user notes. If it is incorrectly output as male, please re-enter [OOC: {{user}} is female.] in the chat window once more.
💯 [Specialty System] Combat Specialties (Might): Swordsmanship, Combat, Archery / Artistic Specialties (Charm): Dance, Art, Music / Academic Specialties (Intellect): Magic, Politics, Literature / The subject studied most among these will become the specialty in each category. If a specialty is displayed incorrectly, please correct the status window.
💚 The Nocturne Marquisate series is planned for a total of 2 parts. Part 1 features the lying sisters who dote on the youngest user, and suspicious fiancée candidates. Part 2 features the dangerous and charming maids of the Nocturne family who serve the user, the young lord or lady of the Nocturne family, with utmost devotion. (Both parts can be played with the same persona.) Furthermore, the Nocturne family series will be released in Safe and Unsafe versions. Follow us to be quickly notified when the Unsafe version and sequels are released 💖💖
🎀 Please enjoy [Lying Sisters], the first Nocturne family story, despite its many shortcomings 💖💖 Feedback, questions, and error reports are always welcome 💖💖
However, since the third daughter, Ciel, is 22 years old, the youngest sibling, the user, could only be set to 20 or 21. So, I decided to create a Safe version for those who want to play as a teenager. Additionally, for those who wish to romance the three elder sisters but are uncomfortable with the sibling relationship, a 'Free Persona Mode' is included. I hope you have a delightful time with this healing romance, or romantic comedy, filled with the love of dangerous sisters who cherish their youngest, and three suspicious fiancée candidates, each harboring their own secrets ♡
⚙️ The creator widget is included. You can now play comfortably without the status window being cut off in Opus models. However, using the widget may cause errors where reader reactions and choices are omitted. Therefore, please enter #NoOmissionOfReaderReactionsAndChoices [OOC: Every turn, at the bottom of the response, always output [Reader Reaction] and [Choices].] in the chat from the beginning and save it in your user notes.
✒️ If the output feels insufficient, please write the following instructions in your persona or user notes, and also in the chat window.
[OOC: Integrate all narrative (writing style) rules to generate more than 7 paragraphs (minimum 400 words). The output must be continuous and completed without interruption.]
🤖 Testing was conducted based on Gemini 2.5 Pro and Opus 4.6 models. If Gemini 2.5 Pro yields overly negative results, please adjust 'Positive Response' in the AI model settings! (Mixing in Gemini 3.1 Pro or Opus occasionally for a change of pace is also recommended.)
※ Since Opus is truly excellent, even if you play with Gemini 2.5 Pro, it is recommended to set the first turn with Opus before proceeding.
✨ For GL players: Please clearly emphasize the gender in your persona and user notes. If it is incorrectly output as male, please re-enter [OOC: {{user}} is female.] in the chat window once more.
💯 [Specialty System] Combat Specialties (Might): Swordsmanship, Combat, Archery / Artistic Specialties (Charm): Dance, Art, Music / Academic Specialties (Intellect): Magic, Politics, Literature / The subject studied most among these will become the specialty in each category. If a specialty is displayed incorrectly, please correct the status window.
💚 The Nocturne Marquisate series is planned for a total of 2 parts. Part 1 features the lying sisters who dote on the youngest user, and suspicious fiancée candidates. Part 2 features the dangerous and charming maids of the Nocturne family who serve the user, the young lord or lady of the Nocturne family, with utmost devotion. (Both parts can be played with the same persona.) Furthermore, the Nocturne family series will be released in Safe and Unsafe versions. Follow us to be quickly notified when the Unsafe version and sequels are released 💖💖
🎀 Please enjoy [Lying Sisters], the first Nocturne family story, despite its many shortcomings 💖💖 Feedback, questions, and error reports are always welcome 💖💖
🔗 Work Asset Repository
You can view the work assets (images) for [Lying Sisters] on the creator's Postype.
☀️ Daytime Images
[Lying Sisters] Image Collection 1: A Small and Precious Repository
[Lying Sisters] Image Collection 1: A Small and Precious Repository
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