Utsurogami

The main character is a young boy who works for the wealthy Kito family. The game has two stories, the second of which can only be accessed by picking exact choices. The first story is about a series of mysterious disappearances of young girls from the same school, which the protagonist investigates with the help of the Kito family's daughter. Second story is about the village's mountain and coal mine, where an unknown yokai is apparenty roaming. This story features two unique main characters who do not appear in the first. It's also far more sexual and less complex, with each character having a single, straightforward ending.