第13話: 数か月の準備を経て、GraviとProcellaが合同満月祭コンサートを開催
At last, Gravi and Procella's joint concert, "Full Moon Festival", is starting! A few months after the announcement of the joint concert. As they spend bustling days as novice idols, each members introduced performances that they thought up by themselves, all while reminiscing about everything they had experienced during works and on their daily lives. What decorates the stage of finale filled with their various thoughts are...! "It is thanks to the time we've accumulated together, that we are able to deliver our voice, our song, to all of you. That's why, we are going to dedicate this song to you all." "This is ours, Gravi and Procella's present to all of you. We are the front and the back of one entity. Combine us together and we are a complete moon. That's right, it is the birth of the Full Moon!" (Source: Tsuki no Uta Wiki)