[Machine Translation] Did I really fuck him? Mako's ex-boyfriend suddenly breaks up with her, and the reason is that he won't let her have sex with him! Drunk from a binge drinking, Mako Momozono falls asleep on a bench where she was supposed to be resting to sober up. Then, her sissy brother's friend, Arata Nanamiya, walks by! Shin takes Mako home to take care of her, but when she wakes up the next day, she finds herself in a room she doesn't know. The next day, he woke up in an unknown room. He woke up the next day and found himself in an unknown room...red marks and pain in his lower back...He also realized that he was naked! This was the beginning of a friendship with him...