She is a beautiful teacher, who pretends to be mature when she first becomes a teacher, but has no intention of exposing her childlike innocence; he is a naughty student, a warm boy, considerate, and is loved by teachers of all subjects who "hate iron but cannot make steel"... Five years apart, they are both teachers and friends. After many years, they reunite unexpectedly, their memories are reopened, and the future has come...
