Keima Katsuragi is an avid gamer and genius at gal games. But what if this so-called "Otoshigami"/"God of Conquest" falls in love? To an idol named Kanon Nakagawa nonetheless! What in the world would happen at this almost impossible pairing? (The World God Only Knows / Kami Nomi zo Shiru Sekai fanfiction ; Keima x Kanon ; a bit AU)