"I've always wanted to touch you like this." As her sensitive nipples are flicked, she watches the face of her childhood friend through his sighing breath. After her husband cheated on her, Haruka decides to divorce him. When she goes to the city hall to file for divorce, at the counter is none other than her childhood friend, Shunsuke. That's right, he works in the family registry department. After a moment of surprise, Shunsuke hands her a marriage registration form..."Legally, you can't get remarried until a hundred days after a divorce. But I'm going to convince you by then," he says, confiding his feelings to Haruka with a passionate gaze. From that day on, her childhood friend's sweet and lustful 100-day proposal began.