My best friend's girlfriend had a big "that" between her legs...! "Takashi" and "Ken" are best friends. One day, Takashi is called to the room where Ken and his girlfriend "Ramu" live together. Takashi, who saw the two of them making out while he was in the bathroom, felt awkward and left the room, but he couldn't stop worrying about the two of them and peeked into the room. What Takashi saw there was the two of them having reverse anal sex! That's right, she was a hermaphrodite! And Takashi, who was called to the two of them's room again, was seduced by Ramu while Ken was out...!!