Eight years ago, my dad remarried and Riho and I became brother and sister. We weren't related by blood, but we were family. We were a happy family. But... before I knew it, I had started to think of my sister as a woman. I was scared to be with her. I was worried that one day I would become aroused by her. So I ran away from her. I used my busy college life as an excuse to run away from my desires, and before I knew it, I hadn't been home for a year. I had no idea that Riho had been violated by my dad during that time...