Horimiya: Hidden Selves, Everyday Romance — The World Behind the Final Bell
A complete world of hidden selves and everyday romance generated by AI from the canon of Horimiya — 19 atoms, character sprites, scene art, and an interactive studio. The world is not the end point, but the starting point of all creation.
Worldview
Katagiri High School looks ordinary from the outside — but behind every classroom face hides a second self. Hori Kyouko is the bright, popular student everyone admires, until she goes home to cook, clean, and raise her little brother while her parents work. Miyamura Izumi is the gloomy, withdrawn classmate who seems to have no presence, until piercings, tattoos, and a soft heart appear the moment school is over. When chance pulls them into each other's hidden lives, a gentle romance blooms between two people who finally feel seen — and around them gather loyal friends, a found-family household, and the ordinary magic of everyday connection.
A modern Japanese high-school slice of life built around one question: can two people who perform different selves for school and home dare to keep loving the whole of each other once their secrets are known — without losing the fragile peace of ordinary life? Every atom in this world — 8 characters, 6 locations, and 5 events — was generated from the canon of Horimiya and lives in an interactive studio where nothing is fixed.
Visual style: soft colored lineart, hand-drawn quality, soft pastel color palette. Claude Opus 5 GPT Image 2
Characters (8)
8 characters generated from the canon of Horimiya, each with an independent personality and two faces: the one worn in the hallway and the one kept at home. The two sprites below were auto-generated by GPT Image 2 as full-body sprite sources for the visual novel runtime.
Locations (6)
Ordinary places where secret lives brush shoulders and soft confessions take root — a school gate in golden light, a lived-in family kitchen, a street that slowly becomes a shared road. Every location carries the warmth of the everyday, rendered in soft pastel lineart.
Events (5)
Factions & Abilities
No armies march through Horimiya — its factions are the everyday constellations people build and defend: the Hori household, a found family held together by a frazzled big sister; the Katagiri High friend circle, slowly turning into a home of its own; and the class itself, where reputations are performed every school day. Each character's real ability is the switch between the face they show at school and the face they keep at home — turning the popular girl into a caretaker and the invisible classmate into a gentle, tattooed softie.
World Rules
Works from This World
One playable work has been generated from this world — Secret Faces, an after-school threshold visual novel about Hori and Miyamura's secret faces, built directly from this world's atoms and art. Play it here: Secret Faces →
Fork This World
This world is public. You can fork it — inherit all 19 atoms, rewrite any card, change the visual style, and generate your own games, videos, and assets from the same universe.
Open the world in its studio, click any atom to inspect or rewrite it, then fork the world to make it yours. Rewriting is creation — every fork inherits the full atom graph, the art, and the interactive studio.
Fork world → Edit atom cards → Generate new games/videos/assets → Publish
Model Pipeline
AI receives the seed prompt "Create a Hori and Miyamura high school romance — two classmates with secret lives discovering each other" and generates the Horimiya world: 19 atom cards across 8 characters, 6 locations, and 5 events.
Every character and location is rendered as an atom cover in the world's visual style — soft colored lineart, hand-drawn quality, soft pastel color palette.
Full-body sprite sources and 16:9 scene backgrounds are generated for the visual novel runtime, then cut out into clean character sprites.
The interactive AVG Secret Faces is built from the world's atoms — an after-school route where the popular girl and the quiet boy drop their masks.
Studio Interior
World, Not Work
In Neta Studio, a world is the beginning, not the end. The Horimiya world is not a game — it is a universe of 19 atoms you can walk into, edit, and rewrite. The Secret Faces visual novel is just one of the works that can grow from it.
World → Game
Select the After-School Threshold and its characters, and AI builds Secret Faces — a playable visual novel where the popular girl and the quiet boy drop their masks.
World → Video
Generate dynamic videos from world characters and scenes — title animations, character entrances, dusk street walks, scene transitions.
World → Assets
Each character auto-generates a sprite, each location auto-generates a background. The world itself is an asset library.
Create from This World
Inherit 19 atoms, rewrite what you want, create your own after-school romance.