Haga Ineko (Michiko Kichise) passed her teacher's exam with the encouragement of the kids in her 4-3 class. Haga is 36-years-old wants to say that she is still single, but her boyfriend and ex-assistant home room teacher Wataru Shioda (Jun Kaname) proposes. While Haga looks at the engagement ring given to her by Wataru she feels happines.

One day, student Tao (Reina Kurosaki) is transferred to her Haga's classroom. Tao's parents were deported from Japan for illegal entry. Even though Tao has a different nationality, Tao is Haga's student and is loved by her, but Tao holds strong resentment against Japan. Marii Kikuta (Riko Yoshida) and other classmates clashes with Tao. Hiro Ebita (Kakeru Totani) and Airi Nakano (Nozomi Ohashi) attempt to understand Tao. Tao refuses there goodwill and becomes isolated from the other students. A rumor spread throughs the school that Tao commited theft. The bullying of Tao by the students become worse. Did Tao really steal? Haga wants to breathrough the barrior by Tao and connect with her. To do so, Haga visits the previous school where Tao attended and talks to her ex-classmates.