https://myanimelist.net/anime/6713/Ranma_%C2%BD__Nettou_Uta_Gassen
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.