[Countach (Kojiki Ouji, Shimao Kazu)] Mysterious Girlfrend SEX (Nazo no Kanojo X) [Chocolate]

Urabe and Tsubaki take their drool-swapping bond to its logical conclusion, discovering that the psychic link letting them share feelings through saliva turns every lick and thrust into a feedback loop of doubled pleasure. The quiet schoolgirl rides her boyfriend with drool trailing down her bare chest, each of them feeling exactly what the other feels—twice the sensation and nowhere left to hide. Then Ayuko Oka struts in with cat ears and a bikini, purring and teasing poor Ueno into a flustered mess while a jealous Urabe looks on.