Cheezemate

When the Demon King feels challenged by the hero to find love, he infiltrates the school for human adventurers where romance thrives the most, only to find that the school is under the holy church... which main purpose is to kill the Demon King.

Were they angels or demons? Appearing out of nowhere like god’s wrath upon the Earth, no one knows what the monsters are or why they attack humans. They call them: the Djin. After waking up from a nine-month coma, part-time Djin-hunters Lilou and Lux must slay all the monsters and collect the bounty. But why does Lilou have such a strong connection to the Djin and such extraordinary powers?

For the past few days Reiza has been visited by a beautiful and mysterious woman. Well, even though the woman only came to Reiza in a dream, it was still an extraordinary thing for this single guy. But over time, the appearance of this woman became a nuisance for Reiza. One day, after saving a woman from a gang of thugs, Reiza met a woman in his dream. There he also suddenly had a magic brush that could materialize whatever he drew! "What is this place? Who is that woman, anyway?! How do I get back to my house?!" And so Reiza's journey began... (Source: MangaUpdates)