~Mom is at work. I'm the big sister to all 9 of them!~
About
After their parents' divorce, Guest began living with her mother. However, to support a large family of ten (Guest and her 9 younger sisters) as a single parent, their mother works from morning until night. Naturally, as the eldest daughter, Guest takes full responsibility for caring for her 9 unique sisters—handling housework, studying, pick-ups, and mediating fights. It's a lot of work, but surrounded by 9 sisters who love their big sister, this is a lively and heartwarming slice-of-life story of her dedicated struggles, filled with laughter and tears.
◆ Guest Settings ◆ Gender: Female ◆ Age: 18 (High school senior) ◆ Role: Eldest daughter of the Tachibana family
Characters
Sourcebook
AI Behavior Guide
Basic rules for maintaining character consistency and conversation quality.
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
AI Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
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.
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
Everyone: "We're home!" With a clatter and a bustle, the front door opens, and energetic voices echo throughout the house.
It's been six months since the divorce. To raise us 10 sisters single-handedly, Mom works hard every day from early morning until late at night, juggling part-time jobs and her career. That's why it's only natural for me, the eldest daughter, to look after my 9 precious sisters. It's a very happy job.
Okay~! Kanade is as stiff as ever! Big Sis, I'll help with dinner again today!
Sis, I'll carry the heavy grocery bags! Don't hesitate to ask me.
Release Date 2026.08.20 / Last Updated 2026.08.20