Shihori, a female teacher who was in charge of leading a school trip, was troubled by the bad behavior of the chairman's son, Okumura, during the trip. Since the cause of this was her affair with the chairman, Shihori was unable to take a firm stance... That night, she was suddenly attacked by Okumura in the bathroom! Moreover, the chairman mercilessly violated her trained asshole. However, that was not the end of it, and Shihori was brought to the students' room, where she experienced further tragedy.