We met through my sister. We got along well and grew closer. One day, when we were alone at my place, she asked, "Do you want to have sex with me?" From that day forward, we had sex many times. Even when we both had boyfriends, the sex we had together was completely different. We could express any perverted desires or selfish feelings to each other. My first time and first creampie were both with Aika. But now, she's getting married...