Mari, who is a track and field athlete, and her boyfriend, a personal trainer. The two train well. Mari attends a drinking party with an alumnus senior. From that day on, her boyfriend worries about Mari, who has become aloof. She says she's going to a training camp, but Mari, who can't get in touch with her, sends her a startling video letter. She said, "There is something I have to tell you. I was violated by a senior... The video I will show you from now on is the footage from that time."
