[Fuka Fuka (Sekiya Asami)] Incubus Manga

A skeptical schoolgirl named Rio becomes the punchline of her own prank when the 'lucky charm' her friends dared her to summon turns out to be a genuine incubus—horned, prideful, and insulted at being compared to a mere human ex. He works her open with his fingers first, mocking her inexperience and her late-night porn habit, then pins her beneath him and drives her past thought with every deep thrust, his sinuous tail joining in until her composure shatters completely. The closing pages leave them tangled together in a tongue-twining kiss as he promises to leave a mark, turning a classroom joke into something far more possessive.