Kyoshitsu ni Sukuu Akumatachi

The story is set in a prestigious local school that is well-known in the county.
However, your class is filled with troublesome students, and the faculty members are all eccentric characters.
The incident involving a male teacher and a female student that occurred last year, which ended in a tragic double suicide, is also casting a dark shadow.
In the midst of all this, the female students from your class are discovered in a completely transformed state.