Eight years ago, Dad remarried, making Riho and me adult step-siblings. We were not related by blood, but we became a happy family. Somewhere along the way, however, I began seeing her as a woman. I was afraid that staying near her would turn my feelings into lust, so I ran away, using my busy college life as an excuse. Before I knew it, a year had passed without my returning home—and all that time, Dad had been raping Riho...