Star Mirai Project: Utahime-hen

VTubers post videos day and night, looking for buzz. Among them, girls who charm people with their singing voices upload new songs every day, hoping to become the divas of the new era. The idol Ariel, who stands at the peak of this world, is so popular that she has become a social phenomenon, but her true identity is shrouded in mystery.

“Ariel is...... dead?”

Nanane, an ordinary girl who admires the idol, but only as a casual fan, can't believe the sudden news. Even more shocking, an audition to find a new singer to replace her is also announced....... Nanane casually applies for the audition, thinking that if she get accepted she might be able to meet her own oshi at the event! However, the true nature of the audition is that it is a battle to the death, where real “survival” is at stake.......

Welcome everyone, to the "Shoujo Circus." The one who survives — will become the next great idol.

(Source: MF Bunko J, translated)