A horror adventure novel that stimulates the imagination.
What do you pray for with a thousand paper cranes?

Senbazuru is generally known to be folded for "prayer". However, it is said that it has the aspect of a kind of obsession and a desperate wish...

The main character "Yuichi Sasaki" is an ordinary 26-year-old office worker. One morning, Yuichi receives a call from a hospital called Tsukumo General Hospital, which he had never heard of.

It seems that his lover, Mayuri, was transported the night before. He hurried to Tsukumo General Hospital, but...

A scenario where you can't predict what's next, a branching system with "cards" that determine the future of the story.

Let's complete various stories surrounding Yuichi and Mayuri.