Reika's father, Tetsuo Tosu, a common salaryman, finds out that her lover, Matori Nobuto, has been physically abusing Reika. Tetsuo discovers Matori's plot to extort money from Reika's affluent grandparents while trying to learn more about him. He also learns that Matori is a part of a criminal organization and has a history of killing his prior girlfriends. Tetsuo kills Nobuto after becoming enraged and terrified at the idea that Reika might be in danger. He then successfully disposes of the body with Kasen's assistance. Tetsuo and Kasen now need to work together to secure the safety of their daughter and stop her from becoming further embroiled in the situation as the syndicate members start to question Nobuto's abrupt departure.