Iwasaki Rumi is a visiting female teacher at a prep school who is teaching Tsuyoshi, a student who is trying to get into medical school. One day, on her way home after a lecture, she is raped by an unknown assailant. Despite her injuries, Rumi somehow makes it to the clinic run by Tsuyoshi's father, Seiichi. Seiichi invites Rumi into the clinic, saying that she needs proper treatment after being raped.