[DODOMESU3SEI] Mazoku-chan 1 (Pixiv Fanbox)

A rookie knight on his first forest patrol spots a hooded stranger among the trees, and within moments his sword is caught barehanded by a demon girl whose strength rivals a vampire's. Defeated, he is renamed 'toilet man' and subjected to relentless femdom humiliation—forced cunnilingus, facesitting beneath her big ass until he can barely breathe, a mouth flooded with hot piss, and even a parting fart offered as a gift. Yet once she vanishes into the wilds, his rage curdles into obsession, and the knight vows to find the demon woman and challenge her again.