I Become The World's First Gay Incubus!!?

I'm Tadashi Lee and apparently the world's first gay incubus?

Tadashi has had no luck when it comes to dating. All the men that he has met were major jerks or looking for one night stands.

The last thing he remembers is following a guy into a forest and now all he knows is that he has to take the soul of 50 different men as an incubus otherwise the devil will take his soul.

What happens when Tadashi falls for the devil in the end?