Ino Sakura relocates to Tokyo to join Fruit Tart, an idol group comprising Roko Sekino, a former child star; Hayu Nukui, a struggling musician; and Nina Maehara, an aspiring model. Settling into their dorm, the Mouse House, the girls face a daunting reality—they are burdened with a staggering debt of one hundred million yen before even debuting! To save their group and dormitory from dissolution, they must climb the ranks of the idol world, crafting their own songs and building a solid reputation. Fortunately, seasoned idol Hemo Midori, a devoted fan of Sakura, decides to lend her talent to the group. With determination and smiles, Sakura and her companions strive to shine as idols, infusing each day with joy and hard work.