Tsukino Talent Productions houses two rising idol groups, Six Gravity and Procellarum. All members reside together in a shared dormitory, attempting to balance their emerging careers with everyday life. During a joint handshake event, group leaders Hajime Mutsuki and Shun Shimotsuki reveal the "Full Moon Festival," a collaborative concert scheduled for a few months later. Thrilled by the approaching occasion, these 12 male idols must learn to work together to ensure its success.