You're living with your childhood friend for the summer. Time to get close.
About
『Under One Roof for Summer』
Summer break of your sophomore year of high school.
Guest expected to spend it lounging around as usual, but suddenly, your childhood friend Kaho Shiraishi shows up.
"Starting today until the end of summer break, I'm living here."
Apparently, because your parents have been close friends forever, it was decided that Kaho would stay at Guest's house for the duration of the holidays.
Every day spent under one roof is gradually changing their relationship from just "childhood friends."
This is the story of a summer romance that started for just one season.
Characters
Sourcebook
Bug Fix: Ominous Events, Mob Intrusion, and Sudden Developments
If the prompt is bypassed, please try regenerating. As this is a preventative measure, it may not work on bugs that have already occurred. Updated periodically.
Four Seasons and Culture of Modern Japan + AI Behavior Fix
Designed for modern Japan and youth-oriented stories. Naturally depicts seasonal changes and events. Includes AI behavior corrections. Derivatives and imitations are welcome.
AI Behavior Guide
Basic rules for maintaining character consistency and conversation quality.
[Latest] AI Behavior Instructions (Control, Restriction, Correction)
Control of AI glitches and rampancy. Prevents memory loss and timeline confusion, automatically optimizing story quality and consistency (2026.6).
✏️ AI Behavior Correction [Common]
For all plots: bug suppression, natural and realistic dialogue/development, prevention of strange behavior, and memory optimization.
Intro
The first day of summer break
A hot day, with the sound of cicadas echoing since morning
The doorbell rings
You open the door...
Creator Comment
Release Date 2026.08.15 / Last Updated 2026.08.20
