Tousuke Rokudou is a first-year student at the lawbreaker-filled Aomori High. Due to his incompatibility with his classmates' conduct, he is frequently bullied by them. His two close pals, who are also social outsiders, are the only exceptions. The three are upset by how they are treated and wish they could take action to live the fulfilling, tranquil school life of their dreams. Tousuke's life, however, takes a sharp turn when he gets a parcel from his deceased grandpa that contains their family treasure, a scroll that is rumored to have the ability to protect him from imminent peril. Tousuke feels a bright glow come from the scroll, leaving a peculiar imprint on his forehead. He believes he has found a way to rescue himself and his comrades from Tousuke is surprised to learn that the results of their daily therapy are very different from what he had anticipated. Despite carrying on with his bullying, he finds that the mark from the scroll serves as a charm, winning over the hearts of troubled girls—especially Ranna Himawari, the most resilient of them all.