An aimless college student comes upon the aftermath of a murder scene one night, and without thinking, grabs the titular weapon. He takes it home and keeps it safely hidden away, but curiosity gradually begins to consume him.

• Uzumasa
• KATSU-do
• Nijiro Murakami
• Alice Hirose
• Lily Franky
• Kyoko Hinami
• Risa Niigaki
• Amane Okayama
• Junpei Goto
• Yuji Nakamura