The World God Only Knows season 1

The World God Only Knows is an anime series based on the manga series of the same name by Tamiki Wakaki. It was produced by Manglobe and directed by Shigehito Takayanagi. 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 lit. glasses (メガネ). One day, out of pride, he accidentally accepts what he assumes to be a challenge for a Bishōjo game when in reality he has accepted a contract from a bumbling demoness named Elsie who asks for his help in capturing runaway spirits from Hell who are hiding in the hearts of girls. The only way to force the spirits out of the girls hearts is by replacing the spirits in the girls' hearts with himself (metaphorically speaking) by making the girls fall in love with him, much to Keima's horror. With the threat of death for both of them should he refuse, Keima has no choice but to help Elsie. 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. It aired from October 6, 2010 to December 22, 2010.

Four pieces of theme music were used for the first season. The opening theme, titled "God Only Knows", is performed by Elisa under the name "Oratorio The World God Only Knows" and the ending theme song is lit. "The Proof of Love" (コイノシルシ) by "The Groove Party God Only Knows" (神のみぞ知り隊) 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, lit. "Just One Miracle at a Time" (たった一度の奇跡) by Tomo Sakurai in episode 4, the second, "Happy Crescent" by Nao Tōyama in episode 7, and the third, lit. "The Dream Traveler of the Integrated Circuit" (集積回路の夢旅人) by Hiro Shimono and Oratorio The World God Only Knows in episode 12.