淫界探偵アラカ ～JK退魔師ミステリ風ADV～

You wake up in the hospital with no memories. They tell you that you were found among the survivors of a landslide that buried a small village called Inusai, with only some spare change in your pocket. Nobody knows who you are or where you came from, but you are undoubtedly connected to the village in some way. Determined to uncover what happened to you, you set off to investigate the site, hoping that something will trigger at least some fleeting memory. Everything becomes even more complicated when you discover the village is still completely intact and its residents are behaving as if nothing happened. Very soon, however, you realize you can no longer leave, and that nothing is as it seems.

[From Saikey Studios' website]