The Witches of Adamas Vol. 9 (manga)

Yukinari swaps one disaster for another when Riamu, his insatiably horny roommate, is replaced by a prissy brat. Unfortunately, this brat is the daughter of a board chairman and she won’t let him forget it. She’s also a perverted imp—literally. Yukinari, the man whose life depends on not coming, must now wage erotic war against Hiro, a succubus determined to make him come by any means necessary!