Kiryuuin Shou is in 3rd year in High School, his friend Jun is heartbroken by his cheating ex-boyfriend Kenji. Kiryuuin and Jun go to the beach to have fun and to meet some new guys. Kiryuuin nearly dies... But he is saved by a sexy lifeguard: Kyan.

Members of SWORD win against Wangan Rengogun, which is led by Kohaku. The city becomes peaceful again. Nevertheless, the most brutal gangs, Doubt and Prison Gang, appear. They try to dominate the area controlled by SWORD.