"Dropout Idol Fruit Tart" centers on a group of aspiring idols who live together in a dormitory called Rabbit House while pursuing their dreams of stardom. The story begins with Hemo Midori, a cheerful and energetic girl who moves to Tokyo to join the idol group Fruit Tart. However, she soon discovers that the group is struggling financially and lacks popularity. The members of Fruit Tart include the serious and hardworking Roko Sekino, the shy and reserved Nina Maehara, and the mischievous and playful Ino Shikanuma. Together, they navigate the challenges of the idol industry while balancing their personal lives and quirky personalities.

The narrative explores their efforts to gain recognition and improve their performances, often encountering humorous and heartwarming situations along the way. The group’s manager, Hayama Natsume, provides guidance and support, though her stern demeanor often clashes with the girls’ antics. As they work to overcome setbacks and build their fanbase, the series highlights their camaraderie and determination. The story also delves into their individual backgrounds and motivations, adding depth to their characters. Through a mix of comedy, slice-of-life moments, and idol performances, "Dropout Idol Fruit Tart" portrays the ups and downs of pursuing fame in a competitive industry.