Hakaima Sadamitsu
English name: Sadamitsu the Destroyer
Genres: Action, Sci-Fi
Type: TV, Episodes: 10
Aired: Jan 17, 2001 to Mar 21, 2001
Studio: Studio Deen
Source: Manga
Rating: R - 17+ (violence & profanity)
Synopsis:
Sadamitsu, a high-school delinguents turned to a masked-hero, while not dealing with his rocky relationship with the strong female protagonist, he puts on a motorcycle-helmet-like mask and becomes a semi-robotic superhero who fights. He is assisted by other possibly- mechanical creatures in order to save the earth from the invasion of 20,000,000 escaped alien convicts.

(Source: AniDB)