Based on doujinshi by MonsieuR (MUK).

Takeshi Naito in his desperate desires to finally lose his virginity decides that he will take a very extreme approach to the matter at hand... by summoning a succubus...

"Wait...isn't she supposed to come out of the circle I drew and not through the door..? Also, why is she so... tiny...?"

After just a few minutes alone with her, there is NO doubt that she is the real deal. Orgasm after orgasm is forced out of him...to the point where he just can't perform anymore... She has a fix for that however! A small bit of magic has him once again standing at attention, ready to have his very soul sucked out of him...