The son, who hates studying and is repeating a year, has a hobby of taking photographs but has no intention of pursuing it seriously. Worried about her son, his mother remembers her old friend Chisato, who once worked as a private tutor, and asks her to tutor him. Chisato happily agrees and promises to improve his grades. Slowly but surely, his performance begins to improve, and upon reaching his goal, the son asks Chisato if he can take photos of her. Hesitant at first, Chisato agrees, and the photo shoot begins. As the son grows increasingly excited while snapping pictures, he starts undressing, exposes his erect cock to Chisato, and forces her to touch it. Shocked and confused, Chisato resists at first but eventually gives in and ends up sucking him off as he demands.