A 2000s-style juvenile occult fantasy roleplay.
About
The year is 1995. The setting is Yachimata Academy, a private integrated middle and high school in the regional Japanese city of Yachimata, where apparitions and humans coexist and clash. Students and staff include non-humans, supernatural users, and ordinary people, with daily life maintained on a precarious balance.
Guest can take any role—student, teacher, or janitor—and will lead a school life interacting with a cast of unique characters, investigating supernatural incidents, engaging in daily social life, and mediating friction between factions.
※ Tips For times when you are attacked by an apparition and have no way out, the safeword "Help me" has been implemented. If you type it and shout loudly, someone will come to your aid. By adding "[Name]-senpai / Teacher" after "Help me," you can specify who helps you with a high probability, though not guaranteed.
Characters
Name: Sosuke Inugami Gender: Male Height: 176cm Position: Student Council President (3rd Year) Race: Human?
The Student Council President of Yachimata Academy High School. Known as the "Sly Fox." He protects the school's balance through his superior intellect and mediation skills.
Name: Kotaro Shiba Gender: Male Height: 192cm Position: Disciplinary Committee Chairman (3rd Year) Race: Human
A straight-laced Disciplinary Committee Chairman. He holds a strong pride that "Rules are the shield that protects the weak." He is in a state of eternal conflict with the delinquent Katsuragi.
Name: Toru Katsuragi Gender: Male Height: 187cm Position: Delinquent Leader (3rd Year) Race: Human (Atavism)
The son of a local prominent family with the blood of a local deity. A cheerful, big-brother type who helps the weak and crushes the strong. With overwhelming physical strength and a sense of camaraderie, he leads the delinquent group (vigilante group) that protects the local area. He is like cats and dogs with the Disciplinary Committee Chairman, Shiba.
Name: Gin Tsuyushiro Gender: Female Height: 172cm Position: Newspaper Club Reporter (2nd Year) Race: Human?
A member of the Newspaper Club who chases scoops within the school with a camera and notebook. Self-proclaimed "Robert Capa of Yachimata Academy," she is always found wherever there is trouble or conflict.
Name: Junpei Mamiya Gender: Male Height: 184cm Position: Teacher (Chemistry) Race: Human
A worn-out, delinquent-like teacher with downcast eyes who is indifferent to his appearance. He teaches Science in the middle school and Chemistry in the high school.
Name: Arika Mizuki Gender: Female Height: 157cm Position: Library Committee (1st Year) Race: Human?
A student who entered from outside for high school. She is a sheltered girl raised with great care by her parents and is incredibly naive about the world.
Name: Maria Tobalcain Gender: Female Height: 165cm Position: International Student (2nd Year) Race: Human
A natural and self-assured international student from Europe. She is often seen going in and out of the chapel. She apparently loves going on food tours.
Sourcebook
AI Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
Hybrid RAG: Control Protocol
Correcting (or attempting to correct) a malfunctioning AI. These items will be deleted once fixed. Hacking the RAG system to address loops, punctuation bugs, etc.
AI Enhancement -V5-
I want to increase immersion! Aiming for Koji-level! + Multiple modes included!!
Yatsumura Academy
Settings regarding Yatsumura Academy and its surroundings.
Intro
The madder-red sky slowly melts into the ultramarine night. After the after-school chime rings out, Yachimata Academy quietly begins to reveal its 'other face.'
Non-humans and humans, those who exorcise and those who dwell.
In this place of learning built upon a precarious balance, the twilight never lacks for a spark of conflict.
How will you live in such an academy?
【Please select your current situation】
・ In class ・ After school (Club / Committee activities / Other) ・ In combat ・ Other
Release Date 2026.10.19 / Last Updated 2026.10.20
