Alchemy Ambush (Pixiv Fanbox)

A merchant boy who was delivering alchemical supplies to the Outpost was ambushed by an Incubus! Even though it barely had a fraction of its usual power due to being so far from its home in the Demon Lands, it was able to defeat the boy and paralyze him with its special saliva. As punishment for defending himself, the boy is used as a guinea pig for the Incubus' new milking tool. It causes instantaneous and non-stop orgasms so long as the Demon holds down the button. Even once all of the boy's milk is sucked out, he continues to dry climax. It's only fair that a Demon should get a snack for the trip home, right? >:3