BLEACH: MEMORIES IN THE RAIN

Kurosaki Ichigo, the temporary Shinigami (Death God) for Kuchiki Rukia, discovers his mother's killer as one of the Hollows he has been hunting. He does battle with it in a prideful battle of revenge. Note: Includes "Bleach: Gotei 13 Omake" as an ending sequence. — Description from AniList community (anilist.co).