The World God Only Knows

Story:

Katsuragi Keima, who is known on the net as the god of getting girls, despises all real-life girls. When approached by Elsie, a devil from hell, to help her capture runaway spirits that hide inside people's hearts, Keima agrees. The only way to force out these spirits is by making the girl fall in love with him. If he fails at this task, he will lose his head.