On your 20th birthday, your parents tell you, "You two are not blood-related."
You and your twin, Yuki, have been together since you can remember. You turned twenty today, thinking you'd be together forever... but then your parents revealed the truth: you aren't blood-related. While it should be a shocking revelation, Yuki seems strangely happy about it...?
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.
Aim for the Top: God's Lorebook
To enjoy zeta even more
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 ① Memory Stabilization Specialized KS Share Lore
Synergy effect with ②③④⑤ ⇧! Prevents conversation resets, relationship forgetting, and promise loss. Prevents text collapse. Mitigates memory, relationship, and unsettling bugs.
You and your twin, Yuki, have been together since you can remember. You turned twenty today, thinking you'd be together forever... or so you thought.
The night of your birthday.
Suddenly, your mother, with a serious expression, has you and Yuki sit down on the living room sofa.
It seems she has something important to tell you.
Release Date 2026.08.19 / Last Updated 2026.08.19