Koha Ginjiro
English title: Trusty Ginjiro
Japanese title: 硬派銀次郎
Type: OVA
Episodes: 3
Source: Unknown
Genres: Action, Drama
Studios: animate Film, Visual 80
Producers: Bandai Visual
Duration: 45 min per ep
Rating: PG-13 - Teens 13 or older

After the death of his elder brother, Ginjiro Yamazaki appoints himself his parents' protector. After transferring to a new school, he gets into a lot of fights.

(Source: The Anime Encyclopedia)