Demon Beast Invasion(妖獣教室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Yoju Kyoshitsu Gaiden) in 1995.