Kakuriyo Village features two childhood friends, Hinori and Ao who end up being stuck in a otherworldly village, where all females are subjugated and reduced to sex slaves. Because of boyish appearance Hinori menages to get with it. Now they need to find a way out and manage to keep her identity in secret. It's very unusual game with a good story, that is teetering between innocence and depravity. Based on you choices it be the most wholesome story you ever read, or go extremely wrong (see tags).