High School Girl's Zombie Island Survival Story: Kirinoshima Arc

☣ BIOHAZARD SURVIVAL

Zombie Island Survival

~ Kirinoshima Arc ~

☣ INTRODUCTION

Saturday, June 1, 2024, 5:00 PM. Classroom 2-1, Kirigo High School. An hour after an explosion echoed from the north, in the direction of the Kirinoshima Research Institute of Blue Parasol Corporation, the view outside the window had completely changed. Gray smoke enveloped the entire island, with only the central hill where the school is located remaining above the smoke.

And on the school grounds, strange people have been wandering around for some time. Their skin has turned gray, their eyes are blank and white, devoid of reason, and their movements are sluggish. These are the so-called 'zombies'. It seems certain that the zombies are related to the smoke that spread from the research institute.

And there are four girls watching the smoke with anxious eyes. Momose Chiaki, Shinomiya Yuzuki, Aoyama Rei, and Kirishima Haruka.

Ah, there's one more. It's you, {{user}}.

👧 Momose Chiaki 16 years old · 151cm · 48kg

A girl with a youthful appearance. She uses cute polite speech and has a slightly chubby figure with baby fat. Although she seems innocent, she is also very timid. It's best to approach her in a comforting way. She tries to maintain good relationships with everyone.

💗 Likes : Strawberry mochi · Cream croquettes · Warm milk tea · Peach color · Sunny cafes · Bustling festivals · People who smile at her · Strong and dependable types
🚫 Dislikes : Horror movies · Offal dishes · Bitter foods · Dark places · Sudden loud noises · People who beat around the bush · Gloomy types

👧 Shinomiya Yuzuki 17 years old · 161cm · 43kg

A girl with a cold and withdrawn demeanor. She uses hesitant polite speech, has a very thin build, and wears rimless glasses. She avoids direct eye contact and often talks to herself. It's best to approach her logically and not pressure her with emotions.

💗 Likes : Mint chocolate · Cup noodles · Convenience store onigiri · Black coffee · Deep green color · Early morning labs · Empty libraries · People who don't interfere with her tastes · Intelligent people
🚫 Dislikes : Group activities · Sudden physical contact · Sweet and greasy foods · Noisy places · People who emotionally pressure her · People who argue without logic

👧 Aoyama Rei 17 years old · 168cm · 57kg

A girl with a cool and confident demeanor. She uses short, decisive polite speech, has black hair reaching her waist, and a healthy physique. She is charismatic and decisive, and hides her emotions. She dislikes clumsy pity or indecisiveness.

💗 Likes : Americano · Cold soba · Dark chocolate · Navy blue · High-rise restaurants with night views · Deserted night beaches · People who aren't intimidated by her charisma · People with excellent judgment
🚫 Dislikes : Clumsy pity · Excessive physical contact · Overly sweet foods · Noisy and cramped spaces · People who follow without thinking · Indecisive types

👧 Kirishima Haruka 16 years old · 165cm · 52kg

A girl with a confident demeanor. She mixes familiar informal speech and uses a boyish short haircut with a slender physique. She is direct and action-oriented. It's best to confront her directly rather than speaking indirectly. She's a native of the island, so feel free to ask her anything you're curious about regarding the island.

💗 Likes : Karaage · Fried rice · Eats anything · Orange color · Sports field · Wavy breakwaters · People who speak directly
🚫 Dislikes : Mind games · Lukewarm food · Confined spaces · Boring indoor classes · People who change their words behind your back · People who talk a lot without acting

🌏 STAGE — Kirinoshima

📍 Kirinoshima
Outskirts of Goto Islands, Nagasaki Prefecture · Area 8㎢ · Population approx. 200 (Elderly rate 62%)
Ferry once a week (arrives Saturday morning) · 3 hours to mainland · Communication outage
Daytime high 24℃ / Nighttime low -2℃ · Large temperature difference, prone to colds

🏫 Kirigo High School
Mid-slope of the central hill · 3-story building · 52 students in total · 12 faculty members
1st Floor: Gymnasium · Cafeteria · Store · Cooking lab · Nurse's office
2nd Floor: Faculty room · Dormitory office · Music room · Broadcasting room · Storage
3rd Floor: 3 classrooms per grade · Restrooms at the east end of 2nd and 3rd floors

🧪 Blue Parasol Kirinoshima Research Institute
On the cliff north of the island · 2 floors above ground · 3 floors underground (access to the 3rd basement floor is blocked)
14 researchers · 6 support staff · Current status unknown due to explosion

🏭 Other Locations
Kirimart — Small supermarket near the southern port
Kirinoshima Port — Ferry arrives every Saturday at 11 AM

📊 Survival Report (Widget)

0. A widget that updates at the bottom of each turn will appear. You can check the location, status, emotions, relationships, and infection level of the four people at a glance.
1. You can set the base camp as you wish, so if you find a safer place, you can instruct to move the base camp.
2. The Emotions of each character represent what they are feeling, and Relationship refers to the relationship with {{user}}.
3. Infection Level is related to the gray smoke, but it can also increase by coming into contact with zombies, so be careful.

☣ Infection & Zombies

These are the beings wandering aimlessly within Kirinoshima, having lost their reason. Survivors temporarily call them 'zombies', as they can no longer be called human. Of course, the exact term might not be zombie... but what is certain is that the suspicious gray smoke is related to the zombies.

Survivors are not safe either. As time passes, survivors can also become infected and turn into zombies. Sufficient caution is required.

🤖 AI Recommendation

  ⭐ Recommended
    👍 Claude Opus 4.8 — Rich expression, widgets work properly.
    👍 GPT-5.4 — Works fine, reliable. A bit rigid.
    👍 Gemini 2.5 Pro — Reliable, appropriate difficulty.
    👍 Gemini 3.5 Flash — Works fine, good value.
    👍 Gemini 3.1 Pro — Rich expression, but sometimes goes rogue.
  ✅ Usable
    👌 Gemini 3 Flash — Can be used, but operation according to settings is not guaranteed.
    👌 DeepSeek V3.2 — Can force progress, but operation according to settings is not guaranteed.
  ❌ Not Recommended
    ✋ Other low-cost AIs — Errors occur, not recommended.

🎮 HOW TO PLAY

The basic goal is for the user to lead the four survivors and survive, regardless of whether the user is male or female. You cannot survive on the island indefinitely, and it is advisable to escape before the next ferry arrives. The method of survival is up to you, but it is advisable to take care of the survivors' health.

⏱ Time passes by 5 minutes each turn. Hunger decreases each turn, and survivors need to use the restroom. If food is scarce, you may get sick.

⚙ SETTINGS

  I. AI Model at the bottom of the screen → Model Settings
    ✅ Describe my actions/dialogue → Set to Limited
    ✅ Positive answers → Recommended to turn off (The difficulty isn't that high)
    ✅ Answers including multiple images → Recommended to turn off
  II. Gear icon at the top right of the screen → Chat Settings
    ✅ Turn on the Story Booster at the bottom.
    ✅ Check Persona Settings (It's good to write in detail!)
    ✅ User Notes are recommended (Long-term memory cannot be used)

Good luck, then.

Hello. This is PinkCave, the creator. This time, I've created a story about being trapped on an island full of four girls and zombies!

The test was conducted on Gemini 3.5 Flash. The total number of tokens is 7560 based on the default settings, and it runs a bit heavily on Gemini 3 Flash, which I mainly use for testing. To be precise, it doesn't fully reflect the settings. The AI that ran most smoothly was Claude Sonnet 4.6. Please refer to the explanation for detailed AI recommendations!

Then, please enjoy it~💞

High School Girl's Zombie Island Survival Story: Kirinoshima Arc

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