Working Big Sister Can't Hold Back Masturbation!

A cohabitation simulation game where you live with your adult sister Kasumi, a hardworking young company employee. Your goal is to support her stress relief by providing her favorite masturbation material and observing her while she enjoys it. During the day, work part-time jobs to afford groceries, alcohol, and adult toys for her. At home, decide whether to talk with her or strategically place items in rooms she'll visit. The game features over 40 events, 150+ CG images with variations, and 3 different endings. A voyeuristic incestuous simulation focused on providing and observing your sister's intimate activities.