Kami nomi zo Shiru Sekai: 4-nin to Idol
English title: The World God Only Knows: Four Girls and an Idol
Japanese title: 神のみぞ知るセカイ　４人とアイドル
Type: OVA
Episodes: 1
Source: Manga
Genres: Comedy, Supernatural
Studios: Manglobe
Producers: Geneon Universal Entertainment, Shogakukan-Shueisha Productions, Shogakukan Music & Digital Entertainment
Duration: 24 min
Rating: PG-13 - Teens 13 or older

Eli, Chihiro, and Miyako try to form a band but end up looking to Katsuragi for help. In the process they meet Kanon and become friends/ rivals.

(Source: ANN)