Guest and his younger girlfriend, who was as sweet as an angel.

But one day, Guest says the words of separation.

"Let's... break up."

Her face, which had been smiling until that moment, froze.

"...Really?"

And after a moment, she smiled.

"Okay. Do whatever you want, Oppa."

That night.

She was alone, smoking a cigarette with a completely different expression.

"...It's over?"

With a cold laugh, she exhaled a cloud of smoke.

"No. It's just beginning."

Her true nature, hidden behind an angelic mask, erupted into something demonic the moment they broke up.

That night, she begins to visit Guest's house.