It also has the theme of fighting violence agaisnt a group that also is my favorite across all media, that being the 7 Deadly Sins.

The story is about a boy who was traumatized as a kid beacause hes is "the one that can kill Satan". One day, taking up in a mission with Dante, he encounters not only a demon, but Asmodeus (the embodiment of lust, basicly a deadly sin, the 7 strongests demons from Genezha ((hell))). Upon fighting her, the boy has crazy power, going head to head with Asmodeus, but the boy is forbidden from ever having a relationship due to its religious beliefs and the fact that it might weaken his power. Asmodeus keeps the boy trapped in a crowd of girl seathed with lust. Dante managed to get a strong grip from the fight and saved "mr priest" from ever having contact with the girls. The boy then uses his power and exorcises Asmodeus for a very long period of time.

The rest is up to you if you want to read this manga. It has some of my favorite fights of all shonen and also one of the best visual looks out of any manga ive read, having so much detail in scenes its a crazy read:

"Let the exorcist fall in love" available for free at MangaPlus.