[Sena Youtarou] Perverted Onei-chan Ch. 1-2

An older sister with glasses, a ponytail, and an insatiable appetite teases her younger brother until he finally snaps, pinning her down to grope her soft, heavy breasts and have his way with her dripping pussy. Things escalate when the brother's girlfriend, Miki, catches them in the act and decides she needs a taste of him too, eagerly deepthroating his shaft while the violated sister watches in jealous, drooling ahegao. The chaotic encounter ends with Miki flaunting her new boyfriend online—much to the brother's despair—proving that both sisters now share an obsession neither of them can shake.