Mizuiro starts at Karakura First High School without any great expectations or ambitions. On the day that the students are assigned to classes, Keigo, who has been hanging around Mizuiro since they met, is shivering with fear. He has just found out that he is in the same class as the notorious ruffians Yasutora Sado and Ichigo Kurosaki. Meanwhile, in the Soul Society, the new lieutenant has been selected. Mizuiro, Ichigo, and the Soul Society all seem to be starting a new chapter in their lives.