A female student, Rena, visits her shut-in classmate, Masao's house. But when I press the intercom, no one answers. When she was about to give up on the errands she had received from her teacher and go home, a man named Koji appeared. Koji calls himself Masao's father and calls his son a "bad boy." Angered by her words, Rena ignores Koji's restraint and enters Masao's room. Masao, who had been standing there, fell to his knees as soon as he saw Rena. And the fellows and Koji who were in the room also joined in the act...
