In the bustling metropolis of MIDICITY, Cyan, a gothic lolita feline catches the attention of Maple Arisugawa, the leader of a music agency. Together, they form a group named Plasmagica with the help of a studious rabbit named Chuchu, techno-savvy Retoree rooted in her retriever origins, and an extraterrestrial named Moa. Their goal is to dominate the music industry and become millionaires through music, but they must overcome various obstacles such as rival bands made up of unique performers. With each triumph, Plasmagica becomes increasingly prominent in the music scene. Ultimately, only time will tell if they can achieve their desires.