[3][4] During the new semester in April, a woman suddenly appeared at Kunikida High.

The other students in the class wondered who she truly was, and what her true intention for going back to school at 35 years old was.

She tried to solve the problems faced by high school students, for example, bullying.

She helped her classmates and befriended them, whilst trying to survive high school and put her tragic past behind her.

Nevertheless, there is no secret that can be kept forever, and eventually the truth had to be let out... even if that meant having to confront her past.