[Tokiwa Midori] Utter Defeat! The Mighty Onee-chan (COMIC ExE 33) [Nisor]

A heated gaming match between siblings derails completely when the cat Nagi-chan scrambles into a busty older sister's top mid-battle, and she refuses to drop the controller even as her breasts spill free for her little brother Yukki to see. Confident she can handle 'knowing this boy,' she lets him cop a feel—only for his touch to melt her resolve, his 'almighty dick' to fill her throat until she can't breathe, and her bedroom dominance to collapse into full surrender. By the last round she's gasping that she might fall in love with her little bro's cock, living up to the promise of utter defeat.