Sun-Ken Rock (Japanese: サンケンロック, Hepburn: Sanken Rokku) is a Japanese manga series written and illustrated by Boichi. The plot tells the story of Ken, a high school delinquent turned down by the girl he loved, Yumin, who promptly left Japan to become a police officer in Korea. Yearning to see the girl he loved, Ken dropped out of high school to travel to Korea and become an officer just like Yumin. Though Ken managed to travel to Korea, he found himself unable to become an officer and instead became a poor Shut-in with no money or job. After saving an old man from being abused by a group gang members, he was scouted by the head of a local gang led by Tae-Soo Park, who made him the new boss. The manga was licensed by JManga, but is now available through a read-only/print-only subscription a