Everybody Wants The Siren's Life!

Catlen opens her eyes to find a village in the process of being destroyed by enemy troops. At first, she doesn't take it too seriously, but after her hand starts to hurt, she's amazed.

"Woah, this game is so realistic! The plot might be awful, but the effects are really good. Look, I can actually feel pain."

Then, a little snot-faced brat says, "Player ID: 'Ittygreenybitties', welcome to the game. You only have unlimited lives for a month, so try not to die after that.'

Catlen can't control her shock. Wasn't she just wearing a VR headset? Could somebody explain where the 'exit game' button is?! Also, she had selected the story arc of the female lead, so why did the interface say she was a short-lived antagonist????