Seiji Yoshida

A professor takes up a new post at an all-girls school only to discover the principal concealing a dark secret.

When the bizarre mass suicide of 54 high school girls throwing themselves in front of a subway train appears to instigate a string of suicides around the country, Detective Kuroda strives to find the answer, which isn't as simple as he had hoped.

Shun Kosaka has a dream of becoming a novelist and lives in a byte at convenience stores at night. He happened to meet Natsuki, and his life began to change. However, they get involved in an incident related to the local mafia.