Yoshimori is depressed after being yelled at by Tokine. To help cheer up his son, Shuji tells him about a legendary chocolate cake. Yoshimori uses his shikigami to go buy the cake, but is discovered by Tokine. Fed up with Yoshimori’s irresponsible actions, Tokine refuses to talk to him ever again. But the following day, a black monster appears in the Yukimura residence, forcing Tokine to ask for Yoshimori’s help.