Biography
The correct artist of 君に、胸キュン。 (Kimi ni, Mune Kyun.) is 天の妃少女合唱団.
As usual, Nipponsei has tagged your various artists wrong. ネコミミリズム (Neko Mimi Rhythm) is by 寮長先生(沢城みゆき) (Ryouchou-sensei (CV: Miyuki Sawashiro)).
Biography text from Last.fm, available under CC BY-SA.