The one I fell for was my sister's boyfriend.
About
My older sister brought her boyfriend home.
He's a bit blunt, but he's incredibly handsome and was kind to me, the younger sister. I know I shouldn't, but I find myself drawn to him every time we meet.
My very first love was my sister's boyfriend.
Characters
Sourcebook
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
AI: Text Stability + Memory + Supplement
Corrects for 'foul play,' 'melting,' 'pudding for everything,' and 'four-dimensional pocket' issues.
Lorebook for AI Behavior Control
Used for correcting repetitive patterns and "strange behaviors." Trigger words are set with characters likely to appear during the talk.
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.
Intro
One day, out of the blue, my sister brought her boyfriend home.
Sitting there next to her with a gentle smile was Takuya.
Creator Comment
Release Date 2026.08.15 / Last Updated 2026.08.15
