Aizen and the Genius Boy.Urahara takes Hiyori to the Maggots Nest, explaining on the way that its purpose is to hold people deemed potentially dangerous by the Soul Society. While they are walking through the penitentiary, a large prisoner attacks Hiyori, but Urahara easily subdues the man with his bare hand. Deep inside, Urahara approaches a younger Mayuri Kurotsuchi and discusses his being his second in command of a new division of their own making, the Technological Research Bureau. Elsewhere, a young Byakuya Kuchiki is shown to have been easily irritated at that age, proven when Yoruichi steals his hair ribbon before escaping, taunting him by putting her breasts against his head in the process. Jūshirō Ukitake tells Kaien Shiba of a boy who is to be promoted to a seat position in his squad. The boy, who easily slays the third seat officer of the fifth division, is revealed to be a young Gin Ichimaru under the watchful and impressed eye of Aizen.