[Maekawa Hayato] Onee-chan ga Doppelganger ni Netorarechau! ch.1-3 [desudesu]

A double with her little brother's face slips between Tomomi's thighs, and her plump, tan-lined body—breasts bouncing through every leg-locked thrust—learns pleasures the real Shouichi never got to teach her. Meanwhile Ryou-nee tearfully confesses she's always crushed on her little brother, trading sloppy blowjobs and paizuri for a promise of lots of sex, while another boy closes his eyes and pretends the warm mouth working him belongs to his own onee-chan. When three identical Shou-chans end up brawling over their cum-covered sister, there's only one fair way to settle who wins: all of them taking her at once.