Futaba Yamabuki, a student who struck his head during a quarrel between students and had a concussion, was brought to the health room. Futaba regained her consciousness while Ayumi, a school nurse, was taking care of her ... Ayumi started preparing to take care of her and take her to the hospital, but Futaba ignored it and went out. ... Futaba has been absent from school since that day. Ayumi and her homeroom teacher, Tsukushi, visit Futaba's home.