Amai Ijiwaru. After her parents' divorce, Kotori lives only with her father, Naoto. Slowly, Kotori develops romantic feelings for him and wants to take her mother's place. Naoto tries to contain his desires but eventually seeks an outlet through paid dating. Rina, Kotori's shy and submissive friend, who is usually inconspicuous, suddenly approaches Naoto half-naked. She shows him her perverted footage from the paid date and blackmails Naoto - threatening that she will keep everything secret from Kotori if Naoto gives in to her wishes. Cornered, Naoto gives in.