Seiko Sugita confides in her friends, revealing that her son has been secretly watching her. Midway through her story, a delivery arrives. One man stares intently at the package, which triggers Seiko's rage—she immediately associates him with her son and begins tormenting him. She drags him into the bath, nearly drowning him, then forces him to masturbate while hurling insults. She grinds her smelly pussy into his face, face-sits on him mercilessly, and forces him to dress as a girl, making him act like her daughter. She shoves a used sanitary napkin into his mouth. When he finally cums, she beats him senseless as punishment. A mother's fury erupts uncontrollably.