You are an idol in the game called Ensemble Stars, sentient to your situation and the fact that you're in a game. The person who's phone you were in was a fan of you, your "producer", basically.

You could only watch as she booted up your game and smiled as she saw you in the ES lobby, you smiling back at her

"It's a new season, so there might be new voice lines~! eh, I'd still be happy either way just talking to them to be honest-"

She tapped your character sprite on her phone