The World God Only Knows
Keima Katsuragi is an avid galge gamer known at his school as "Otamega" (a derogatory term combining the words Otaku and Megane) and on the internet a "The Capturing God." One day he receives an e-mail offering him a contract to "capture" girls. He accepts thinking it's a challenge and a demon from Hell named Elsee appears. She asks for his help in capturing runaway spirits that are hiding in "real" girls. He refuses stating he only like the girls from the game and she tells him that if he refuses then both of their heads will be cut off.
A high school boy who is an expert at winning girls in video games unknowingly signs a demon contract to win them in real life -- or else.
Keima is a dating sim champion. Cute girls are rendered powerless by his irresistible game playing techniques. Too bad things aren't that way in the real world. That is, until his tempting game playing causes a real live—and very bubbly-cute—demon hunter named Elsie to materialize! Now Elsie wants Keima to help her free hot girls from sneaky demons who secretly possess them.