Terror! The Monster That Lurks Underground

Hanataro Yamada, Nanao Ise and Ikkaku Madarame are sent to investigate some thefts that have taken place, and track the culprit to the sewers. They discover a white, robot-like figure, and are then attacked by a large monster, which manages to injure Ikkaku. The strange figure heals Ikkaku and fires a powerful blast at the sword fiend, defeating it. It is revealed that the robot is Hanataro's zanpakuto, which had resisted Muramasa's control because it did not resent Hanataro. The group returns the stolen items, but Hisagomaru, Hanataro's zanpakuto, was separated from the group.