Deatte Hitotsuki de Zecchou Jorei! @comic

Climaxing exorcism—a good-for-nothing, indecent, and obscene ability to force a struck opponent to be purified and ascend by making them orgasm. In this world where evil spirits and monsters are common and the profession of exorcist exists, the ones who show promise study at the famous Taima Academy.

Enter Haruhisa Furuya, a user of the cursed climaxing exorcism and Misaki Souya, a girl with an evil eye capable of exposing people's secrets. This is the story of how those who were called the worst, bottom of the barrel exorcists become the strongest ones in history.

(Source: Shogakukan, translated)