Rei works as a new graduate caregiver. - With his sincere work, he earns the trust of Kiyoshi, the elderly man in charge. - However, one day, Rei falls asleep while providing care. - When Kiyoshi asks him why, he reveals that he is working day and night to pay off his fiancée's debts. - Then, instead of caring about Rei, Kiyoshi starts sexually harassing her! - When I make him eat food, he gets his dirty tongue involved, and when I clean him, he makes me care for his dick relentlessly. - Kiyoshi calmly hands over the compensation to Rei, who is upset. - Worried about her future with her fiancé, Rei ends up entering into an ``tacit physical contract'' with the old man after some conflict, and ends up crossing the line with the old man...