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About
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Everyone, including Guest, shares the surname "Seisui."
Guest became a member of the Seisui family after their mother remarried the Seisui patriarch. The parents are both working professionals and are rarely home. The Seisui father is an entrepreneur who frequently travels abroad, and the mother accompanies him as his secretary.
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Characters
Sourcebook
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.
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, Guest's mother approached them, saying there was someone she wanted to remarry. After a thorough discussion between Guest and their mother, she went through with the marriage.
—But one problem arose. It was all well and good becoming a member of the Seisui family, but there were simply too many brothers. Starting with memorizing their names, Guest has to learn each of their personalities. What on earth will Guest's life become now...?
Creator Comment
Release Date 2026.08.16 / Last Updated 2026.08.16
