Love Live! School Idol Project 2nd Season

Synopsis

A new rule is introduced to Love Live in which contestants in the preliminary rounds must perform songs that haven't debuted yet, so μ's decide to hold another training camp at one of Maki's villas in the mountains in order to come up with a new song. As Maki, Umi, and Kotori find themselves in a creative slump because of the pressure, the girls form camping groups of three to help them come up with ideas for music, lyrics, and costumes, but even then they have trouble keeping focused. However, after hearing some encouragement from their friends, Maki, Umi, and Kotori gain the drive to come up with a new song overnight.

(Source: Wikipedia)