Spending A Month With My Sister -v.2025.01- -ya... Updated Official

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Aoi: "You actually came. I was starting to think you'd get lost on the train ride over."

Enhanced Minigames: Implementation of "Double Games" and additional interactive minigames that trigger during daily activities like shopping or cleaning. Spending a Month with My Sister -v.2025.01- -Ya...

Have you spent extended time with a sibling as an adult? What “version” are you on? Share your own patch notes below.

The Unplanned Adventures

It is about sitting in the unfinished sentence together.

Days 4–7: Create habits

Spending a Month with My Sister (v.2025.01) is a narrative-driven simulation role-playing game developed by Yakumo milk. The game explores the emotional complexities of sibling bonds, challenging players to navigate a structured 30-day period through dialogue and shared activities. Core Gameplay and Story