In the Joseon Dynasty...

prolog..

유빈

My name is Bin. My last name is Yubin and my first name is Bin.

유희

Sister Bin..!

유빈

'Anne is my twin sister...'

유빈

why..?

유희

What's going on today..? Oh right, Junmyeon, our third-year senior, said he has an event today so what are you doing...?

유빈

really..?

백현

What what what?

유빈

Just say it once

유희

no..

백현

Oh... what the...

종대

Hey, let's go, Byun Baek

찬열

Where are you going?

종대

Hey, just follow me

유빈

Hey, let's go together too

유빈

let's go

유희

Huh? Yeah

Aha ...