Other name: ハンマーセッション in High School; ハンマーセッション! in High School; 震撼鮮師高校篇; 震撼鲜师高校篇; Hanmaa Sesshon! in High School;
Summary: Six months after the events in Hammer Session!, the genius swindler Otowa Yonko returns with the goal of acquiring more formidable achievements. A chanced encounter with his former partner-in-crime Mizuki sensei however, prompts him to come to Hanazono High School to help solving his fellow students' problems, using his signature Hammer Session.