らんま１／２　熱闘歌合戦•

Ranma 1/2: Hot Song Contest

A two-part music OVA series never released outside of Japan featuring the main Ranma 1/2 characters. They appear to be having a music contest at a local TV station. As everybody knows, these characters can't get along for more than three minutes and hilarity and hijinks ensue. (Source: AniDB)