Gedou Gakuen -nightmare Campus- 1-5 -a-d- -with...

The series revolves around the story of Souichi Tatsumi, a high school student who transfers to Shikageya High School. He soon discovers that the school is not as ordinary as it seems, with various supernatural and horror elements lurking in the shadows. Throughout the series, Souichi interacts with a range of characters, including his friends, teachers, and love interests, as they navigate the dark world of Shikageya High.

This title has a complicated release history, which explains the different filenames found online: Gedou gakuen -Nightmare Campus- 1-5 -A-D- -with...

Here is a helpful content guide regarding this series. The series revolves around the story of Souichi