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In their 7th year of a public relationship, actors Cha Joobin and Gong Yoochan are one of the entertainment industry’s famous couples.

On the day a magazine about their love story is released, they decide to break up due to getting tired of their relationship.

However…

“Hey, you know… it’s time for you to film Romance Diary. Even if you’ve broken up, you already signed the contract, right?”

Considering the contract and various benefits involved, they decide to become a ‘show window couple’.

“Hey, no matter what, you still need to have some manners, right?”

“Seems like you’ve got a lot of time to spare, worrying about all this after we’ve broken up?”

“Why are you being so rude?”

“Is this the first time you noticed…?”

Why is this guy being such a jerk?

“There are cameras everywhere, set them up in the living room. Did you see them?”

“Not yet.”

“This is getting interesting.”

But surprisingly, the rude Cha Joobin is different in front of the camera.

Can they successfully live this show window couple life without being exposed?