Sayuri is a female teacher who commands respect from her students for her lovely yet maternal aura and tall looks. However, her careful, individualized teaching methods, tailored to each student's individuality, and her desire to leave no one behind, leave the other teachers and staff confused and leading to misunderstandings, and the friction in their relationships only increases. One day, the head of the grade level tells her that her students' late after-school instruction is too much...