Thanks to her teacher, who never gave up on Mayuki and always supported her, she was able to pass the entrance exam to the university she wanted. After two years, Mayuki returned to her hometown for the first time, but her parents were traveling. Suddenly, Mayuki saw the fragrant pouch she made for her teacher, and remembering old memories, she decided to visit him. It had been a long time since they last met, and her teacher was very surprised to see how much she had grown and become incredibly attractive. The two talked joyfully until they lost track of time. It was late, and with nowhere else to go, Mayuki had to ask her teacher if she could stay. That night, they both drank a lot of alcohol together, and Mayuki quickly got drunk and fell asleep. When she woke up, she found her teacher touching her body! Actually, Mayuki had secretly liked her teacher before; she had written him a letter when she graduated. The teacher also knew, so when he met Mayuki again, he couldn't control his feelings. And throughout that night, the two seemed to return to the time when Mayuki was a diligent student studying hard. Only this time, the lesson she was being taught was... sex!