Mika is always kind and deeply loves her gentle son, Keita. One day, while cleaning, she accidentally discovers porn magazines in Keita's room. Confronted with her son's adult side for the first time, her heart begins to race uncontrollably. That night, when Mika enters the room, she finds Keita holding the porn magazine. Surprised, she tries to speak to him, but in an instant, Keita's demeanor changes completely. Mika is forcefully and intensely taken against her will.