A female student, Kanon, visits the home of her shut-in classmate, Masahito. However, when she presses the intercom, no one answers. As she puts some papers in the mailbox and prepares to leave, a man named Kita appears. Kita says he is not Masahito's family, but calls Masahito a "bad kid." Angered by his words, Kanon ignores Kita's pleas to stop her and enters Masahito's room. As soon as Masahito sees Kanon, he pins her down and devours her body. The others in the room then join in the action...