Suenaga Hijiri's dream to become a teacher is realized when she gets assigned to a middle school as a teacher. There, she has a fateful encounter with Kuroiwa Akira, a middle school boy who has a mysterious charm. However, Hijiri is already engaged to be married to Kawai Shotaro, a man she's known since college. Hijiri agonizes between Akira, the boy with a fascinating aura, and her fiancé, Shotaro, with whom she'll be sharing her life.