On a wintry February 13th, amidst swirling snowflakes, Pythagoras Production witnesses the emergence of a new idol group: Marginal #4. Comprising Atom Kirihara, Rui Aiba, L Nomura, and R Nomura, these idols vow to spread their charm across the galaxy with heartfelt performances, fueled by unwavering fan support. Juggling their school lives, the quartet navigates the demanding entertainment industry alongside Lagrange Point, the seasoned pioneers, and Unicorn Jr., the aspiring newcomers. Beyond the glitz of stage life, they are just typical high school boys caught in the whirlwind of teenage chaos. Enter the world of Marginal #4, where school routines intertwine with the dazzling journey of idols destined to outshine the celestial bodies above.