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.
Suspecting that they may have been framed for a crime they didn't commit, Kunio and Riki escape from prison and set out to find the person who framed them and clear their names.