Shimai jiken-bo: Etchi ni marumie(姉妹事件簿 エッチにまる見え)

Rika, who has seen the rough life of her unlucky mother, can not dream of male and female relations, and it is everyday that she uses erotic SNS exclusively and has erotic chat with unspecified men over the monitor. It was One day, Rika is urged to masturbate by the man in the chat, and begins to writhe at the screen. At the moment you reach the culmination, you notice that multiple men are watching over the screen. But it's her natural inspiration that she sees when she reaches her sexual height.