Mika (Morihotaru), the mother who had been supporting her son, who was about to take an exam, and his friend Horita. One day, Mika engages in a physical relationship with Horita, who made advances on her, for just one time. Horita can't get Mika, who has an outstanding style and is kind, out of his head. He can't forget the hot kiss they shared that day, the intense fellatio, and the sensation of inserting into her vagina raw; he breaks his promise with Mika to do it only once. However, Mika accepts Horita in a private lesson... They lick each other's crotch, covered in drool, and Mika straddles him, shaking her breasts fervently. Finally, she urges him to ejaculate inside her vagina...
