For Ozawa, whose marriage has cooled, the only thing that keeps him company is the time he spends with his students. However, one year before retirement, one student upsets him... Azusa Hikari. An excellent student with excellent grades and serving as student council president, for some reason her grades are dropping in Ozawa's classes. Worried, Ozawa gives her extra lessons after school, but Azusa just stares at him with a grin and doesn't listen. The moment he tries to tell her off, she suddenly kisses him. From that day on, the two of them grow closer...