After ten years since graduation, there finally took place a class reunion, especially with the participation of the former homeroom teacher, the one whom the student Miku Maina had previously confessed her feelings to, but failed. On that day, both Miku Maina and her husband attended together since her current husband was also a former classmate from high school. While he was chatting happily with a close friend, Miku went to interact with the teacher but suddenly received a phone call from a superior reporting an incident at work. This forced him to immediately go to work overtime at the company until morning to meet the deadline, leaving his wife and the fun behind. As the class reunion was nearing its end, Miku Maina was feeling dizzy from drinking too much wine, and seeing this, the former homeroom teacher offered to take her to rest in a nearby hotel. At that moment, emotions flooded back, and he expressed his regret for rejecting her confession in the past, wishing to have a sexual encounter with her once, both for the first and last time, to make up for that regret. Throughout that night until the next morning, their party had not stopped...
