Following his online singing stints as 'KIKUNOYU,' Akira Kiyose catches the eye of talent agency sMiLea Production. This agency, led by former idol sensations AneLa, specializes in nurturing fresh idol talents. Joining forces with fellow recruits Banri Naoe and Chihiro Isuzugawa, Akira embarks on a journey to form the idol trio Protostar. Together, they are set to make their grand entrance into the world of idols alongside other promising groups under sMiLea Production's wing: Legit and Jaxx Jaxx.