Demon Beast InvasionDemon Beast Invasion.

Demon Beast Invasion (Japanese: 妖獣教室, Hepburn: Yōjū Kyōshitsu) is a manga series written and illustrated by Toshio Maeda, published by Wani Magazine. The series was adapted into a six-part original video animation of the same name in 1990, followed by Demon Beast Resurrection (妖獣教室外伝, Yōjū Kyōshitsu Gaiden) in 1995.