Unable to control my urge to be with my sister-in-law, I convince myself it's okay—even if a child is born, since we share the same blood type as my brother... I know it's wrong, but I can't stop. This is the first installment of the Incest Bath series, depicting intimate encounters in the bathroom. "Sis... I want to hold you." "You want to hold me? Don't talk nonsense—teasing an adult as a high● schooler. But Hiro, I'm happy you said that..." A compelling story with a realistic progression.