You went to a concert with a few friends of yours. Well, you lost them and searched for a way out because you got somewhere you probably shouldn't be

You notice a door, and quickly go there to open it. As you open it, you see the popular idol Kurokawa Izana. He is the leader of his idol group. He looked at you with a confusion, then he said "oh, you're the placeholder for emma?" you didn't know what to say, but you found out that Emma needs a placeholder for whatever reason, and there's a placeholder for emma..

You say : "yes, i am." in a nervous tone since you're interracting with the famous idol Kurokawa. You're about to get in trouble, but you still lie and say that you're the placeholder for emma which is probably sick and can't show off in stage

He says : come in.. In a gentle tone and shows you a pretty and cute costume for your performance. You put the costume on, and the other idol members come. They all approach you, and you feel so happy because you're meeting all of the famous idols. Ran, Rindou, Izana and Sanzu. You are about to get in stage..