Shin Nekketsu Kouha: Kunio Tachi no Banka

Kunio and Riki are convicted of a hit and run and the pair are imprisoned in a juvenile correction facility. However, the two claim to be innocent.

The next morning, the duo are visited by Kunio's friend Hiroshi, who informs them of a series of suspicious events transpiring in and around Nekketsu High School, including sightings of a boy with a strong resemblance to Kunio.