Hwa-Yeon meets his favorite idol Queen at his regular bar. He gets really nervous and drinks a lot of alcohol, quickly getting drunk and passing out. When he comes to, he's in a hotel room. Queen says she brought Hwa-Yeon to a nearby hotel after he collapsed, but the door won't open. he's checking things out when the TV suddenly turns on.

You have to complete the mission to leave this room.

Me having sex with Queen, and with the idol I've been secretly in love with...?

(Source: Ridibooks, translated)