After breaking up with her, Keisuke meets Yuka while he is heartbroken. He's older than me, so he was like a younger sister, but when Yuka was drunk and sent home, they ended up having a physical relationship. From then on, Keisuke can't get Yuka out of his mind, whether he sleeps or wakes up. He knows he doesn't like it, but he's getting more and more addicted to it...
