[Kotoba Ai] Hitori Camp o Shite itara Kuro Gal JK na Imouto to Imouto no Tomodachi ga Rannyuu shite kita Kekka Kouhen (COMIC Grape Vol. 95) [Thennos Scans]

A solo camping getaway spirals into a steamy threeway when a brother is ambushed in his tent by his dark-skinned gyaral sister and her busty blonde friend, who decide a bit of "revenge" is in order after he abandoned her. The buxom pair takes turns lavishing attention on the lucky lad—mouth, tits, and more—while trading quips about whose technique feels better and whose "cunnlingus" is cleaner. Bodies heave and slick up under the panel-to-panel progression of sweaty, breathless fun that culminates in a very satisfying, very messy nighttime release.