Run, get caught, get fucked!! A gangbang hell descends upon female teacher Nao Kiritani!! Nao is a teacher at a co-ed school, highly trusted by her students and living a fulfilling life, with marriage to her boyfriend on the horizon. However, Nao was unaware that there was a graduate who harbored a twisted affection for her... One day, a man calling himself "Suzuki" appears before her. That reunion with Suzuki was the beginning of an endless "on-campus gangbang game of tag"!!