[Yurarin] I Became My Sister's ATM <First Part> (COMIC Mugen Tensei 2022-09)

Yua stumbles home long past curfew to find her worried older brother waiting up, and his scolding collapses into shock once he learns his little sister has been doing compensated dating with strangers behind his back. Stepping in as her personal ATM, he claims her for himself, and the schoolgirl discovers she'll happily give up paid dates if it means worshiping her onii-chan's hard dick with her hungry mouth before spreading her stocking-clad thighs to keep bonding as siblings. What starts as a transaction melts into something neither can walk away from, as Yua's womb aches to carry her brother's child and he is more than eager to breed her.