Hiroshi Tsukiyama works as a salesman for a company. One day, a female colleague is sexually harassed by her boss and Hiroshi sees the harassment but he ignores it. A mysterious man, Choyaku Tsuchida, appears in front of Hiroshi. He takes Hiroshi to a secret club "Oh My Jump." The club is for adults who are fans of manga magazine "Weekly Shonen Jump" and they gather there to talk about their favorite titles and characters.