Shier has two sons. The eldest son, Hui, has inherited the ten shadow spells of the Chanyuan family. The youngest son, Yuto, is the same as him with 0 magic power. The squatting soft rice boy at home rubbed the head of his youngest son with the tyrant. What does Yuuto want to be in the future? Killer, undercover, bad boy... a policeman is also good. Yuuto just came back from the kindergarten after listening to the biography of the samurai Nanjiro: Want to be the world's number one professional tennis player!