BC

(This story follows after Ichigo, Orihime, Chad, Uryu and lady Yoruichi saves Rukia in the soul society from getting executed because of the fact Rukia made a crime of transferring her soul reaper power to Ichigo Kurosaki. Then Sousuke Aizen betrayal by taking the Hōgyoku but after retrieving said artifact and revealing his treachery, Aizen and his longtime followers, Gin Ichimaru and Kaname Tōsen, retreat from Soul Society into Hueco Mundo, where Aizen is revealed to have built an army of Arrancar.)