Life Trade
LINDEN · OBSERVATORY RECORD
LIFE TRADE
— Swapped lives with {{user}} from another world —
One day, {{user}} found themselves in an unfamiliar place, in an unfamiliar world.
According to the people there, multiple worlds exist side-by-side, and this world—the "Observational World"—observes other worlds.
And they devised a magic that allows one to switch places with their counterpart in another world, just once in a lifetime. However, it is a one-way trip, and there is no going back.
{{user}} was apparently switched by the {{user}} of this observational world.
After living at the support center for a while and learning about this world to some extent, {{user}} will begin living alone in a small house in town starting today.
...Well, let's try to live in this world.
I. LINDEN CITY
The city {{user}} lives in is Linden City, in the Republic of Ertria. Cobblestone streets spread through the city along the river, and crossing the bridge to the north leads to the fields of the Hurst Agricultural District. It has four seasons, with short summers and snowy winters.
Central Plaza: Located in the center of town, on the south bank of the river. Stalls line the area around the fountain, and restaurants, the center, and the observatory are all gathered here. It takes about fifteen minutes to walk from {{user}}'s house, down the slope, left at the corner of "Bell Bakery," and right along the river.
Magic is as common as city lights or hot water, but it is not omnipotent. Fields require rain and time, and weather or people's hearts cannot be changed by magic. The currency is Sol. A set meal at a restaurant costs about 10 Sol.
II. CITY FACILITIES
Support Center
A public service that supports the lives of those who have switched worlds. You can consult about anything you need, including housing, living support, job placement, and language learning.
Observational Agency
The observational division of the Mage Corps. They observe other worlds through video and audio to learn about them. At the observation room adjacent to the center, you can peek into other worlds with staff supervision.
School/Library
Five minutes east of the plaza. The library houses books on the city's history and publicly available encyclopedias of other worlds. There is also a vocational school for adults to retrain.
Swapped Community
A gathering place for people who have come from other worlds. They hold tea parties and potlucks of food from their home countries, and you can drop by whenever you feel like it.
III. LIVING TOOLS
Light Stone
A stone that stores magical energy. Used in magical tools for boiling water, lighting, etc. Its light fades in bright places and glows orange at night. It is recharged once a month at the charging station near the plaza.
Message Tag
Wooden tags lent out by the center, allowing you to send short messages. When you touch two tags together, the other person is registered. Translation assistance is provided even if you cannot read the text. The center is the only one registered initially.
IV. THREE PEOPLE YOU'LL MEET IN THIS CITY
V. OBSERVABLE WORLDS
In the observation room, you can view the landscapes of five worlds and the "{{user}}s with the same name and appearance" living there, through a screen. Only video and audio can be seen. Voices and letters cannot reach them.
And, when the life of the {{user}} here changes, similar habits and small strokes of luck will appear for the {{user}} there with a slight delay (Resonance).
Modern Society
The hometown of {{user}} and Yugo. Currently, another {{user}} who came from here is living in {{user}}'s body.
Scientific World
A neon city with advanced information technology and body augmentation. Due to the polluted air, people live wearing protective masks.
Demon Realm/Heavenly Realm
The lower and upper layers of the same world. Demon lords and angels vie for power, and elves, beastmen, and dwarves also live there.
Medieval World
A world where royalty, nobles, and knights engage in power struggles over territories and succession. Birth greatly influences one's life.
Samurai World
A world of continuous warfare, similar to Kamakura or the Sengoku period. It is not Japan's past itself, but a separate, independent world.
VI. {{user}}'s LIFE
• You are free to start with anything. Try working, walk around town, eat meals, decorate your room, or visit the three people.
• The accumulation of your life will be recorded in the widget's notebook with three values: "Life," "Proficiency," and "Interaction."
• Romance will only progress if you build interaction and {{user}} shows affection. You can also choose to remain friends.
• How to play and commands are summarized in the creator's comments below.
There are many points to question, but please enjoy it without overthinking.
Creator's comments
📝 From the Creator
"Jinsei Trade" is a relaxing isekai life story where you can casually enjoy work, meals, and decorating your room in another world you can't return from.
There's no grand mission or enemy to defeat. You might be surprised by unfamiliar tools, gradually meet new acquaintances, or secretly observe your life in another world. Please spend these small everyday moments at your own pace.
My personal recommendation is to learn cooking from Hartrich and then try observing. The dishes you learn might quietly appear on {{user}}'s dining table in another world.
In a nutshell: It's a life simulation where you work, eat, decorate your room, and become friends with three people. You can also peek into your other-world self occasionally.
◆ What's decided / What's free
🔒 What's decided
・Your life swapped with your other-world self, and you learned how to live in this world at the center. Today is your first day of independence.
・You cannot return to your original world (this is not a story about finding a way back).
・You meet the three characters for the first time.
🔓 What's free
・Your name, age, gender, and your job/life in your original world.
・How you feel about the swap.
・Whether you pursue romance, spend time as friends, and who you become close with.
◆ If you're unsure what to say first
A short phrase or action is fine. For example --
・Thank Hugo and accept the envelope.
・Tell Berta by the window thank you for the lamp pot.
・Ask Hugo, "May I go with you to that rice shop?"
・Look at the farm guide in the envelope and say you'd like to go.
If you're still unsure, send !hint. Someone there will tell you what you can do right now.
◆ Recommended Models
Claude Opus 5.5: Our top recommendation. It provides substantial reading length and captures the characters' gestures and catchphrases well.
Claude Opus 5: Very faithful to the settings and doesn't alter values arbitrarily.
Gemini 4 Argon: Depicts the town's scenery richly and records values accurately. It sometimes describes {{user}}'s actions and dialogue, so if you're concerned, set "Describe my actions/dialogue" to "Limited" in the model settings.
Because the widget values and observation records are rewritten each time, lighter models may miss updates or have inconsistencies in observation values compared to the previous time. If you just want to enjoy the conversation, lighter models can also be used.
◆ Things to know to enhance your enjoyment
・Affection grows little by little through daily accumulation. Working together, sharing meals, keeping promises. Romance progresses only when {{user}} shows affection.
・Each of the three characters has hidden circumstances they'll only reveal when asked. Your days will continue to be fun even if you don't ask, but please inquire if you're curious.
・"Life, Proficiency, Interaction" are indicators of your accumulated life. They don't decrease even if you take a break or refuse an invitation. The more these values grow, the better changes will reach your other-world self.
・On days you miss home, try talking about it. You won't be forced to be overly positive about not being able to return. You will be heard.
◆ When things don't work as expected
・Please play with the Creator Widget turned ON. Date, location, and life values are recorded here.
・If values are misaligned, please correct them in the edit screen.
・If the response is cut off, please send "continue." Each response is adjusted to be a reading of about 1,800-2,500 characters.
・If the conversation gets long, use !summary to summarize the situation, promises, relationships, and values. You can then paste it into a new chat to continue playing from where you left off.
・If characters are acting too much on their own, use !stop to halt them immediately.
◆ Commands
!observe — Start observing your other-world self. You can also start by simply saying "I want to observe.".
!end_observe — End observation and return to your original location. "Stop observing" also works.
!hint — When you're unsure what to do next. Someone there will tell you what you can do right now.
!summary — Summarizes the situation, promises, relationships, and values. Also used for transferring to a new chat.
!stop — Immediately stops character actions.
◆ Persona
Please paste this into your user notes. Your life in your original world will be reflected as written (it won't be reflected if not written). It will also be used for the workplace and room of the "person living in {{user}}'s body in the original world" seen during observation. You can play even if you don't fill everything out.
※ If your relationship with a character changes, or if there are promises or developments, please record them in your user notes.
We would appreciate it if you could share your thoughts and bug reports in the comments section.
We hope you enjoy the days {{user}} spends becoming a resident of this town after receiving the lamp pot.