River City Ransom (Nintendo Cinematic Universe)

River City Ransom is a Japanese graphic novel.

Summary
When the Hattori twin invade Reihō Academy, Kunio and Riki must put a stop to them.

Plot Elements

 * Several months after Kunio defeated Sabu and rescued Hiroshi, twin brothers Ryūichi and Ryūji Hattori transfer to Reihō Academy.
 * Within a few months, the brothers take control of the neighboring high schools using powerful fighting techniques, striking fear as the "Dragon Twins".
 * Riki, the banchō of Hanazono High School has no interest in the brothers or what they have been doing. But one day his girlfriend Mami goes missing and he receives a challenge from the academy.
 * Enraged, Riki decides to make his way to the academy alone but finds Kunio waiting for him outside his school.
 * Kunio wants to help Riki rescue his girlfriend and he begrudgingly agrees.
 * Kunio and Riki succeed in driving the Dragon Twins away.