A diligent university student named Nakahira excels at his part-time job in a local convenience store—so much so that management promotes him to train new staff. Meanwhile,
Sayama is an experienced former teacher who shelved her career to become a full-time homemaker. Neglected by her busy husband and seeking purpose alongside income from a side gig at the same store where Nakahira works. As the inexperienced Sayama finds herself relying on Nakahira's help for daily tasks and growing closer to him,
Nakahira confesses his struggles with academics. Eager to apply her teaching skills beyond textbooks,
Sayama agrees to tutor him at his home. When they arrive back in Nakahira’s apartment, the broken air conditioner has left Sayama drenched in sweat. In response to Nakahira’s undeniable gaze fixed on her alluring figure, she strips off her jacket! Recognizing his intense interest, Sayama decides to teach him a more... practical subject: 'Sexuality,' promising it will boost his focus dramatically.
