Futaba Yamabuki, a student who hit her head during a fight between students and suffered a concussion, was brought to the infirmary. Futaba regains consciousness while nurse Ayumi takes care of her... Ayumi starts preparing to take her to the hospital, but Futaba ignores it and leaves. … Futaba has stopped going to school since that day. Worried Ayumi and her homeroom teacher, Tsukushi, visit Futaba's house.
