START-587 [Brother and Sister Impregnation] Having lost my parents at a young age, I became jealous of my sister's fiancé when he was introduced to me, and repeatedly had unprotected sex with him in order to be with him forever. - Ichinomiya Rui

My sister and I lost our parents when we were young, and we've supported each other through tough times, just the two of us. When my sister grew up and introduced me to her fiancé, I was genuinely happy. That is, until I saw her having sex with her fiancé… Driven mad by jealousy, I snatched her back and repeatedly ejaculated inside her. We promised each other that we would live together forever…