Bringing his best friend to his lover's house was a very stupid decision for Sayama. Just in the morning, the lucky guy received a call from his girlfriend informing him that her best friend was coming to visit. It was so sudden that he couldn't prepare anything in advance and had to wait for his girlfriend to come over to prepare. Hearing the doorbell ring, he went to open the door and suddenly his eyes met a beautiful young woman with a gorgeous dress standing with her girlfriend. The lust from both of them emerged right after this first meeting. After that, secret love affairs continuously happened between them in the secrecy of their poor, innocent girlfriend.