Kona Mix!

is a japanese manga series written by Ishizu Kayu. It began serialisation in the April 2013 issue of Manga Time Kirara Forward.

The series was released under 2 volumes from August 2013 to March 2014.

Synopsis
The world's first "invisible" idol! An idol unit "Cherrysea" consisting of Kairyu, Misaki, and Nagisa. At first glance, this unit of three people actually had another member, Konami Taiyo. Konami's idol activity, which has an exceptional singing ability but loses its presence due to its reaction, disappears ...!?

(Source: Amazon JP - Translated)