Realistically, how much of a sheltered upbringing has Uta really had?
It seems like she's been helping out with the family business from a pretty early age.
When other girls her age spent time getting ahead physically, mentally and socially through club activities and cram school, Uta waited the tables at Cafe Glitter, her only source of joy being the songs she'd sing to herself and the customers as her youth wasted away.
Love has given Uta newfound strength, but life has a funny way of stealing our love away from us, leaving us in the dark from which we all came. Meroron is right for relentless pursuing her love, because she knows what a fragile thing it is.

This person did the Idol Heart Ribbon Style transformation.
>https://twitter.com/kuubyo/status/1979699557232689515