: The show occasionally shifts genres, including a zombie-themed episode (Session 6) and a "murder" mystery (Session 9).

: Early episodes focus on her bandmates, Suzu Fujimi (the leader/bassist) and Fuuri Watanuki (the drummer), as they practice and perform, eventually working toward a major New Year's Eve concert.

The series explores Sonico's personality—klutzy, kind-hearted, and a massive lover of stray cats—through various scenarios:

: She serves as the lead vocalist and guitarist for the indie rock girl band First Astronomical Velocity (Daiichi Uchū Sokudo).

: A recurring theme is how Sonico’s unwavering hard work and pure heart influence the people around her, including her modeling associate Ouka Satsurikuin and even her own five pet cats .