"How can you have a twin and not tell me?!?!?"

"You never asked."

For the past three years, Yunri has been living next to her best friend, Jo Kwangmin.

The two are inseparatable!

Whether if it's attending school, working, eating, or just lounging around and doing nothing, Yunri and Kwangmin do anything and everything together.

So there she thought, there were absolutely no secrets between them.

That is, until she finds out he has a twin.