Sun-Ken Rock

The story revolves around Ken, a man from an upper-class family that was orphaned young due to his family's involvement with the Yakuza; he became a high school delinquent known for fighting. The only thing that motivates him to take action is through his romantic affections for a classmate, Yumi. After learning she decided to move to Korea to become a police officer, Ken leaves his life in Japan behind and tries to follow in Yumi's footsteps; due to unforeseen circumstances, he incidentally becomes the head of a local gang and tries to hide it from Yumi. As the leader, the gang is renamed the Sun-Ken Rock Group.

(Source: Wikipedia)

Included one-shot:
Volume 12: Trigun: The Lost Plant

Sun-Ken Rock was published digitally in English through Crunchyroll. It was also published by Shonen Gahosha through Manga Planet from May 21, 2020 to July 1, 2021. The volumes have been published by Kodama since April 1, 2026.