Nakahira is currently a university student, and he works part-time at a grocery store. Although his studies are not going well, he excels at his part-time job and has been promoted by the manager to be a guide for other staff. Sayama used to be a teacher, but she had to give up her dream due to her husband's family obligations and became a full-time homemaker. Sayama's husband is always busy with work and does not pay much attention to her. Sayama decided to take a part-time job to kill time and earn extra income. As a newcomer, Nakahira helped her a lot, and they gradually became closer. Nakahira shared that he was struggling academically, and Sayama wanted to use her teaching skills to help him. When they both returned to Nakahira's house, the air conditioning in the room was broken, and sweat soaked Sayama's shirt, so she took off her jacket. Sayama's attractive body made it hard for Nakahira to look away! Knowing that Nakahira was paying attention to his body, Sayama taught him about 'sex', helping him to focus better on his studies...