Ranka Lee is on her way to S.M.S. to drop off some items for her older brother Ozma Lee when she happens to meet Sheryl Nome. Alto Saotome also shows up when the two arrive at an observation park, but then the Vajra loom over from the skies above.

Sheryl gives a consolation concert at planet Galia 4, but because of an undisclosed illness she cancels her concert, which causes a huge riot.

Alto and Ranka make an emergency landing in planet Galia 4 due to a malfunction with their variable fighter.

While Sheryl is recovering from her illness, all her work is cancelled. When she is informed that Ranka's popularity is now rising she becomes insecure and worried about her own musical career. During that time, Alto and Ranka give her a friendly visit.

Ranka's pet Ai-kun suddenly disappears. Ranka asks Brera for help and they look for Ai-kun together. Along the way, Brera asks Ranka who does she sing for? Ranka, who's beginning to feel doubt about her singing, starts to consider her true feelings. Meanwhile, Sheryl tells Alto that she will no longer sing.

After arriving at the planet of origin of the Vajra, the Frontier fleet commences an all-out attack and Battle Frontier manages to charge directly into the center of the enemy forces. However, Island One (the main residential area of the fleet) receives a fierce counterattack from the Vajra and becomes endangered. During that time of crisis, the silhouette of a person starts projecting on the stage at the Battle 25 bridge.