- Her mother Saki is immersed in masturbation with a bewitching voice. Kazuya gasped at the too lewd sight that he stumbled upon by chance. Surprised, bewildered, excited. Of all the emotions that welled up, the one that shook Kazuya's heart was Saki's lonely expression. "Mom, I'm lonely..." I am the only one who can satisfy my mother. - Kazuya decides to cross the forbidden line at the appearance of Saki who is disturbed.