Anime XXX - Yuuguu Settai Kotou No Gokuraku E Youkoso 1

A high school owned a training facility on an isolated island far from the main land. Because the janitor died unexpectedly, Ohmi Riku took over the duty for a two-week period. His life was meant to be peaceful, surrounded by pretty females from the swimming club and his teacher. His life was turned upside down when he discovered a slew of video tapes that had been secretly taped. In the videotapes, there was a moment in which a man, most likely a predecessor, was abusing a girl in a swimsuit. Then Riku discovered that his predecessor was often sneaking pictures. He glanced down on him at first and sealed the video recording. However, he grew to sympathize with the evil spirit of his predecessor...