[1] The series follows the exploits of Keima Katsuragi, an intelligent, gloomy teenager who is known on the Internet as "The God of Conquest" for his legendary skills to "conquer" any girl in Bishōjo games, yet does not like girls in real life, where he is known as the Otamegane (オタメガネ), a derogatory portmanteau of the two words otaku (オタク) and Megane (メガネ, lit.
Together with his intelligence and knowledge of the dating sim genre and Elsie's magical powers, Keima is about to embark on his greatest challenge.
"The Proof of Love") by "The Groove Party God Only Knows" (神のみぞ知り隊, Kami nomi zo Shiri-tai) which is composed of the first season's voice actresses, Kanae Itō, Ayana Taketatsu, Aoi Yūki, Nao Tōyama and Kana Hanazawa, who each sing a solo version of the ending theme song with the rest as back-up.
Additionally, three special ending theme songs were used, the first, "Tatta Ichi Do no Kiseki" (たった一度の奇跡, lit.
"The Dream Traveler of the Integrated Circuit") by Hiro Shimono and Oratorio The World God Only Knows in episode 12.