Title: Youjuu Kyoshitsu Gaiden
Japanese Title: 妖獣教室外伝
Synonyms: Demon Beast Resurrection
Episodes: 4
Released Date:  Nov 17, 1995 till Sep 13, 1996

From the radioactive emptiness of space comes the Demon Beast! A hideous alien monster, the Beast shares a psychic link with the beautiful Earth woman, Kayo. Bound by a forbidden past and a horrifying erotic encounter, she is destined to lure the Beast back to a helpless Earth. Her tortured soul cries out across dimensions, calling the Demon Beast to begin his reign of bloodlust, carnage, and terror!

(Source: AniDB)

Screenshot:       
Prequel: Youjuu Kyoushitsu
Format: mp4
Uncensored

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Episode 1     
Episode 2    
Episode 3     
Episode 4