Nao was asked by her pregnant sister to take care of her brother-in-law, Yoshio, while she was hospitalized for tests. Then, by chance, Yoshio witnessed him walking with a strange woman ... - She rebelled against Yoshio, who tried to be unfaithful at her sister's difficult time. - "Is it okay for any woman?" - Yoshio, who was so excited that he was abused by Nao, who sent a disdainful gaze, tried to silence her. Nao is humiliated while experiencing so much regret that she wants to kill her, and she continues to be squid many times.