[Amamitu Hakushi (Amamitu Kousuke)] Mokou Onee-chan to Shota ga Ecchi Suru Hon 7 (Touhou Project)

Fujiwara no Mokou happily admits she loves doing lewd things with her young lover and adores the cute faces he makes—but the little guy works up his nerve and asks that they do it 'like lovers,' and that onee-chan start making requests of him for a change. Emboldened, he buries his face between her enormous breasts and kneads them from the outside until she's a sweaty, gasping mess who can barely form words. Once neither of them can hold back, she straddles him and rides slow and deep, sighing that unhurried sex with the person you love most feels better and better.