[Jeanne DA'ck] Muchi Muchi to Model (WEB Ban COMIC Gekiyaba! Vol. 164)

Risa, a naive sister blessed with huge breasts, big nipples, and a tanlined, curvy body, agrees to model for her glasses-wearing artist brother again after he begs her for one more session. Knowing she has zero knowledge of sex—she even mistook his porn mag for a bathing guide—he spins a tale about artists needing their dick jerked off by a girl to draw smoothly, coaxing her from innocent posing into a handjob and then deep, sweat-soaked nakadashi sex. Between her swaying twintails and jiggling big ass riding on top, his creative focus melts into pure incestuous defloration of his oblivious little sister.