Thanks to the teacher's help, Mayuki never gave up and was always there to help, so she could pass the university entrance exam she wanted. After two years, Mayuki returned to her hometown for the first time, but her parents were traveling. Suddenly, Mayuki saw the scented pouch she had made for her teacher, remembering past memories, so she decided to visit him. It had been a long time since they had seen each other, and Mayuki's teacher was extremely surprised to see how she had grown up and become very attractive. The teacher and student talked happily, forgetting about time. It was late, and there was nowhere else to go, so Mayuki asked her teacher if she could stay there. That night, they drank a lot of alcohol together, and Mayuki quickly got drunk and fell asleep. When she woke up, she saw her teacher touching her body! In fact, Mayuki had secretly liked her teacher before, and she had written a letter to him when she graduated. The teacher also knew, so when he met Mayuki again, he couldn't control his emotions. And that night, they both felt like they were back in the past, when Mayuki was a diligent student. The only difference was that the lesson she learned this time was... about sex!