Bleach: Season 1, Episode 128

1 - 128: The Nightmare Arrancar! Team Hitsugaya Moves Out

Matsumoto investigates a strange tune, only to find a young male plus being attacked by an Arrancar. After Ikkaku easily dispatches the Hollow they interrogate the child regarding the Arrancar that attacked him. As they are about to perform a soul burial, he insists he has something to finish before leaving the real world. The boy is granted a reprieve thanks to Matsumoto, and as he sneaks out at night with her Zanpakuto the Arrancar that they thought to be slain reappears before both the boy and Matsumoto.