When Mako, a mother, finds out that her son Naoya is being bullied by his friend Kenji, she warns Kenji. However, Kenji starts threatening Mako, saying, "I won't bully Naoya if you have sex with me." Mako resists, but thinking about Naoya, she has no choice but to accept Kenji. Naoya secretly witnesses the whole thing... Naoya, who lacks the courage to stop it, can only watch...