Demon Beast Invasion (妖獣教室) 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) in 1995.

Plot

Millions of years ago, Earth was inhabited by a race of anthropomorphic giant monsters that can grow tentacles. Following an ecological disaster, the Earth's atmosphere had started to become inappropriate for their cellular respiration and they migrated to the planet Quasar PHL-5200. Nevertheless, they did not forget about Earth and have started to send successive vanguards. Referred to as Demon Beasts by the Interplanetary Mutual Observation Agency operatives that try to stop them, the aliens are seeking to create a race of human/alien hybrids which would adapt to the Earth's atmosphere and to rule the Earth by proxy. The story is centred on Muneto Ungyōsai and Kayō Asakura, two college students living in Tokyo. Maitreya is presented as an eschalotogical opponent to the end-days to be brought by the alien invasion.

Main characters (anime)

Episode 1 Episode 2 Episode 3 Episode 4 Episode 5 Episode 6

Demon Beast Resurrection

Purgatory (Episodes 1 & 2) Soul Survivor (Episodes 3 & 4)

Allegations of promoting obscenity

In 1999, Jesus Castillo, a clerk at Keith's Comics in Dallas, was accused of promoting obscenity for selling an issue of the Demon Beast Invasion manga to an undercover officer. He was fined $4000 and sentenced to one year of unsupervised probation after the original six-month prison term sentence was suspended.