4-year-old salary man Tsukiyama Hiroshi comes across a secret club where people who love Shukan Shonen Jump gather and chat about Jump’s famous manga, popular episodes and favourite characters. As Tsukiyama comes in contact with these people, he is slowly influenced by them and begins to change. Tsukiyama who is drawn to heroes, and the other members soon come out to discover that they are involved in a global calamity?!