My mother and I had intercourse during my pregnancy—knowing we were not related by blood, we indulged in the act of procreation—Tada Yuka ROE-262

Kosuke was switched at birth, a fact that Yuuka had kept hidden. However, when she finally told Kosuke the truth... he learned they weren't related by blood, and he confessed his long-hidden desires, pursuing her intensely. As they understood each other's desires, their tongues intertwined, crossing a line... Yuuka, craving a penis, frantically demanded penetration, and Kosuke, in turn, forcefully violated her, not wanting her to get pregnant...