Kami nomi zo Shiru Sekai: 4-nin to Idol
神のみぞ知るセカイ ４人とアイドル
Fall 2011 OVA Manglobe
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: Anime News Network)
