After ten years of graduating, a class reunion finally took place, especially with the participation of the old homeroom teacher, the person that Miku Maina had previously confessed to unsuccessfully. That day, Miku Maina and her husband both attended because her current husband was also her old high school classmate. While he was happily chatting with his best friend and his wife went to socialize with the teacher, they suddenly received a phone call from their superiors about a work incident. This forced him to immediately go to the company to work overtime until morning to meet the schedule, leaving his wife and the fun behind. When the class reunion was almost over, Miku Maina was also drowsy from drinking too much alcohol, so her old homeroom teacher immediately took her to rest in a nearby hotel. At this moment, his emotions rushed back, he expressed his regret for rejecting her confession before and he wished to make love to her for the first and last time to repay that regret. Throughout that night until the next morning, their fun did not stop…