BLEACH: The DiamondDust Rebellion - Mou Hitotsu no Hyourinmaru

A powerful relic called the "King's Seal" is taken during transit in the Soul Society by an unknown group. Toshiro Hitsugaya, who was responsible for transporting it, battles the group's leader before vanishing. The Seireitei soon brands him a traitor and orders his capture and death. Ichigo Kurosaki, refusing to accept this, teams up with Rangiku Matsumoto, Rukia Kuchiki, and Renji Abarai to find the true culprits, locate Hitsugaya, and prove his innocence. Meanwhile, Hitsugaya, now on the run, investigates those behind the theft and discovers a hidden truth about a deceased shinigami.