6pathsofpain

The World God Only Knows(Kami nomi zo Shiru Sekai)

(This one goes out to all the nerds who have no luck with girls)

Katsuragi Keima has no luck with girls. Except for on the net, he's so good at dating simulation games that he is known as the "God" of that world.One day, he gets a message from a demon from hell named Erushi. She's heard that he's a master at making videogame girls fall in love with him,so she needs his help in capturing demons that hide in the hearts of young girls.Hiding in the heart of a girl will assure that the demon will be reborn as a human through childbirth and will have free reign over their own power.And the only way to force them out is to fill the space in the girls heart the demon is hiding in by making them fall in love.

So now he's on an adventure with Erushi to caputure the demons, and the hearts they reside in.

This is an awesome manga, read it on onemanga.com.
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I don't like surprises.The last time I was surprised,that pack of wolves was ruthless.~Misery from Ruby Gloom