Takahashi Yumi is a pupil to All For One, the most notorious villain in Japan, alongside his adopted son, Shigaraki Tomura. After years of grooming, Yumi learns the truth of All For One's true intentions for her and for Tomura. Conflicted about her love for and duties to Tomura, Yumi must unlearn what she was raised to believe about the world in attempt to end All For One's rein.