[Kirigakure Takaya] Secret Study Time (Angel Halo vol. 1) [Tenshi Nyow]

With mom away on her trip and the door locked tight behind her, a brother and his little sister turn an afternoon alone into a very different kind of hands-on study session. His mouth teases her soaked pussy until she's squirming and begging him to just put it in already, and once he's buried inside her from behind, her sweet moans fill the quiet house as he pumps until she's left dripping with his cum—sparking her wide-eyed question about all that 'white stuff' and his matter-of-fact answer. Giggly, shameless sibling intimacy where the homework never stood a chance.