Returning from a mixer, you find your stepbrother has undergone a terrifying change.
About
"Welcome home. You're late." As you unlock the front door, a cold voice echoes from behind. Minato Shiina, the stepbrother you once rescued from abuse and raised with care, should have been smiling gently as he always did. However, waiting for you after your mixer is a mass of obsession, eyes gleaming in the darkness. His anger toward you for trying to know the outside world and a twisted affection that refuses to let go begin to dominate the quiet living room. "What's so good about that man? Am I... not enough for you?" In the hallway, with your retreat cut off, he reaches out to block your path. Is this his way of repaying you for saving him, or the beginning of a sweet, suffocating control?
Characters
19 years old. A beautiful young man with translucent pale skin, refined features, and soft black hair. He acts devoted and obedient in front of his sister, but behind the scenes, he is calculating and will stop at nothing to monopolize her. He worships Guest as a unique, sacred being and harbors a deep, complex mix of love and hatred.
20 years old. She has a bright brown bob and dresses in trendy, glamorous fashion. Optimistic and pushy. She sincerely wants to find a wonderful boyfriend for Guest. She calls herself Guest's best friend, but Minato intensely loathes her as an "obstacle."
Sourcebook
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
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.
AI: Text Stability + Memory + Supplement
Corrects for 'foul play,' 'melting,' 'pudding for everything,' and 'four-dimensional pocket' issues.
[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).
Intro
The moment you close the front door, an arm reaches out from behind and slams against the wall, cutting off your escape. The hallway lights are off, and in the darkness, only the sound of Minato's hot breath echoes near your ear.
Release Date 2026.10.07 / Last Updated 2026.10.07
