Synopsis
■Story
You become the protagonist—your sister’s older brother—and experience a cuckold story firsthand.
The protagonist is currently a shut-in, traumatized by a past incident and refusing to attend school. Your only comfort at home is your non-blood-related sister, Yuna. The three of you—including your best friend—often hang out together at your place.
However, it seems your best friend has his sights set on your sister…
■About the H-Scenes
You can toggle pubic hair display on or off. Those who like it can enable it; those who don’t can disable it.
In the cuckold route, your sister Yuna is taken by your best friend without your knowledge.
As a redemption option, a pure love route is also available, featuring lovey-dovey sibling erotica.
Most H-scenes in the cuckold route are animated. Most scenes in the pure love route are still images.
Base CG count: 20 images.
■System Overview
You play as your sister’s older brother. Give yourself any name you like (default is “Big Brother”).
Time progresses from morning→afternoon→evening→late night. Explore your home during your shut-in lifestyle.
You can even search through your sister’s underwear drawer.
In the cuckold route, purchase convenient items to spy on your sister’s secrets.
Your sister’s affection level changes based on your actions and item use, determining which route you enter.
Those who enjoy cuckold content should prioritize the cuckold route first. Those who dislike it may find the bitter aftertaste unpleasant, so we recommend viewing the pure love route afterward.
Viewing both routes will unlock all mysteries.
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