Takumi Nakatsugawa

A love story that takes place in the present day and in the past. Tamura Takuro is 27 years old and works as an art teacher at a high school. He is popular among the students. Yayoi is one of the students in his homeroom class. She spends her days without a goal in her life. Tamura Takuro recommends that she joins the art club. One day, Yayoi happens to see Tamura Takuro's sketchbook. The sketchbook contains countless sketches of a woman that Yayoi doesn't know. That woman is Yumiko. Yumiko was Tamura Takuro's Japanese language teacher and his homeroom teacher when he was a 17-year-old high school student. He loved his homeroom teacher.

Aoki has a crush on Hashimoto, the girl in the seat next to him in class. But he despairs when he borrows her eraser and sees she's written the name of another boy—Ida—on it. To make matters more confusing, Ida sees Aoki holding that very eraser and thinks Aoki has a crush on him!