Six Gravity and Procellarum are two up-and-coming idol groups signed to Tsukino Talent Productions. The units all reside in the same dorm and strive to balance their burgeoning occupations with their daily lives. Unit heads Hajime Mutsuki and Shun Shimotsuki announce the "Full Moon Festival," a collaborative concert coming up in a few months, during a joint handshake event. These 12 male idols, who are all very excited about the approaching event, must learn to work together in order to pull it off.