Dear My Abyss

"Dear My Abyss" is visual novel game, where three childhood friends (Subaru, Misuka and Kazumi) receive a weird book from an anonymous sender. It's a sealed horrible smelling book and comes with a warning to never open it, read it and that it's impossible to get rid of it in any way thinkable, once it's in someone's possession. This doesn't stop Subaru, the outcast of the trio to take a look and read from it. After a few days several weird things happen to the community in which the trio lives, including the disappearance of the friendly class-room teacher, appearances of strange people all across town looking for the book and a mysterious transfer student.

The game is split into two parts. The first part takes place from the perspective of Misuka as a bystander, as things get out of control and get weirder and weirder and serves as an introduction to the second part, which places Subaru as the protagonist and tells the strange journey from her perspective.