Story :  Satoru finally got a girlfriend and is enjoying life as a high school student. However, after he and his girlfriend, Saori, had sex for the first time. Satoru is concerned about how popular his girlfriend is with the guys at school, and Saori is worried that Satoru will find out she's been faking it when they do the deed. On her way home from a summer festival, Saori is approached by the school playboy, Yuuya, who saw her outside and recognized that she faked the grand finale. When Yuuya forcefully stimulates her sexual desires, Saori gives in to her uncontrollable curiosity...