The keyword typically refers to a subgenre of life-simulation and visual novel games, most notably Living with my Little Sister by Saikey Studios and various titles by PillowCase . These games focus on the "30-day challenge" of cohabitation, tasking the player with balancing a professional life—often as an illustrator—while rebuilding a bond with a sibling who has suddenly moved in. Core Gameplay Mechanics
Players must balance their own energy and stress levels. Overworking can lead to burnout, while spending too much time on leisure might result in failing work deadlines. Popular Titles in the Genre 30 days ~ life with my sister