Bleach: The DiamondDust Rebellion

When a caravan transporting the King's Seal is attacked, Toshiro Hitsugaya and Squad 10 are on the ready. As they prepare to protect the treasure that holds immeasurable power, Hitsugaya suddenly abandons the scene alongside the thieves and becomes one of the accused. In response, the Soul Society calls for his capture and execution. Upon hearing the edict, Substitute Soul Reaper Ichigo Kurosaki is immediately suspicious and determined to uncover the facts. But when Hitsugaya refuses to defend his actions and fights against his comrades, it seems his fate is all but sealed. Can Ichigo uncover Hitsugaya's motives before they destroy his honor, his life, and the Soul Society? (official distributor synopsis)