Six Gravity and Procellarum, two emerging idol units, reside under the Tsukino Talent Productions banner. These units coexist in one dormitory while managing to balance their up-and-coming careers and everyday lives. During their handshake event, unit leaders Hajime Mutsuki and Shun Shimotsuki share the news of their upcoming event, the "Full Moon Festival," a fused concert scheduled in a few months. Anticipating the event, the twelve male idols must learn to work together to succeed.