Booing!!!

 was a sub-unit of Idoling!!! originally formed in March 2014 to participate in the Japanese soccer support album ULTRAS 2014.

They remained active until February 2018. They never announced a disbandment or suspension of activities, but their only activity since was an online fan meeting in November 2020.

Members

 * YURICA
 * LUKA

Mini Albums

 * [xxxx.xx.xx] Overlap!!! (オーバーラップ!!!)