In a situation where the light music club is facing a crisis due to a lack of members, four high school girls of the same age have gathered! They are all cute girls, but when it comes to their activities in the light music club, they don't seem very reliable... To make matters worse, one of them is a complete beginner who knows nothing about instruments or light music (even though she's the main character!) Can they really pull this off?! Despite everything, the light music club starts its activities, goes on a seaside training camp, seeks out their advisor... Now, let the performance begin!