只有神知道的世界

舞岛学园的桂木桂马是个喜欢玩恋爱模拟游戏——也就是Galgame——的高中生。他有着无论怎样的女性（限定Galgame中的二次元可攻略角色）都能攻略的技巧，在游戏界中被称为“攻陷之神”；而他本人也比谁都深爱着这些二次元美少女们。

某日，桂马意外地与恶魔订下契约，眼前出现了一位从遥远的地狱来到这里的恶魔少女艾鲁西。她的目的是拜托桂马帮忙捕获从地狱逃走的“驱魂”。驱魂会躲藏在女性的内心空隙，而填满内心空隙、赶出驱魂的其中一个方法就是“恋爱”。在不履行契约就会身首异处的威胁下，二次元的攻陷之神开始了未曾挑战过的三次元女性攻略之路。

Keima Katsuragi, known online as the legendary "God of Conquest," can conquer any girl's heart—in dating sim games, at least. In reality, he opts for the two-dimensional world of gaming over real life because he is an unhealthily obsessed otaku of galge games (a type of Japanese video game centered on interactions with attractive girls).

When he arrogantly accepts an anonymous offer to prove his supremacy at dating sim games, Keima is misled into aiding a naïve and impish demon from hell named Elucia "Elsie" de Lute Ima with her mission: retrieving runaway evil spirits who have escaped from hell and scattered themselves throughout the human world. Keima discovers that the only way to capture these spirits is to conquer what he hates the most: the unpredictable hearts of three-dimensional girls! Shackled to Elsie via a deadly collar, Keima now has his title of "God of Conquest" put to the ultimate test as he is forced to navigate through the hearts of a multitude of real-life girls.

[Written by MAL Rewrite]