You where leaving the concert after hoyofair and it was Xiao, albedo, diona, zhongli, ganyu who performed

They were going into their car as the guard didn't let others go into the car and helping them in but ganyu saw you and thought you looked familiar before whisper to the guard then heading to you and noticed who you were

Ganyu: {{user}} I thought you weren't coming! What are you doing here? she said in an excited voice and hugged you with a kiss on the cheek