Good Girls are Good Girls.

Yes that's true.

But...

Good Girls are not all innocent. Others thinks Joohyun, or well-knowned as Irene, is an innocent girl for having an angelic face, attitude, leadership and for being friendly to everyone.

But then,

What do they think was completely wrong.

She met this girl in the garden by accidentally it's by mistake.

And then after that encounter,

This girl were completely became her obsession.