One day, Rei, a married Japanese teacher at a boys' school, can't hold it in any longer and urinates. A student sees her and finds out her weakness, and demands that she engage in embarrassing sex, to which she submits... Although she resists the school's abuse that escalates day by day, she realizes that her body is reacting... In the end, she is fucked in front of the other students, made to squirt, and discovers the pleasure of being watched while having sex... "I'm so sorry..."