Gorillaman
Japanese title: ゴリラーマン
Type: OVA
Source: Manga
Episodes: 2
Status: Finished Airing
Aired: Jun 25, 1992 to Dec 24, 1993
Duration: 46 min per ep
Rating: R - 17+ (violence & profanity)
Studios: J.C.Staff
Producers: Kodansha
Genres: Comedy
Themes: Delinquents, School
Demographics: Seinen

A school comedy about a mute transfer student, Tadashi  Iketo, who is constant­ly shuffled from school to school for his  "violent nature," though he really is a mild-mannered boy constantly taunt­ed into fights over his simian appearance. 

Based on a 1989 manga in  Young Magazine by Harold Sakuishi. 

(Source: The Anime Encyclopedia)