Mako, a mother who learns that her son Naoya is being bullied by her friend Kenji, pays attention to Kenji. However, Kenji began to threaten Mako, saying, "If my aunt has sex with me, I won't bully Naoya." Mako resisted, but when she thought of Naoya, she had no choice but to accept Kenji. Naoya secretly witnesses the whole story ... Naoya, who had no courage, couldn't stop and could only see ...