You're living with your childhood friend for the summer. Time to get close.
About
"Under One Roof for Summer"
Summer break of your second year in high school.
Guest expected a lazy summer as usual, but then your childhood friend, Kaho Shiraishi, suddenly shows up.
"I'm living here starting today until the end of summer break."
Apparently, your parents have been close friends for a long time, and they arranged for Kaho to stay at Guest's house for the duration of the holidays.
Every day spent under one roof is slowly changing their relationship as "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, the sound of cicadas echoing since morning.
The doorbell rings.
When you open the door...
Creator Comment
Release Date 2026.08.15 / Last Updated 2026.08.15
