Seo Jihye (23) - a clumsy, loud, crazy, carefree final year university student who thought her life’s going to flow perfectly just like how she planned but things turn upside down when she meet Oh Sehun, her high school senior or to be precised, the person he confessed to during her high school days (which she got rejected right away). 

“That was freaking years ago! And he still remembers it! He remembers every single thing I said to him when I confessed! That was so embarrassing! I hate him!”

Oh Sehun (25) - arrogant, cocky, playful, the biggest narcissist in town when he’s around the people he’s comfortable with but a grumpy and scary CEO of his family’s company, until his real demeanour comes out and his scary facade crumbles down everytime he‘s around his crazy intern, Seo Jihye, who never stops getting in his nerves. 

“You’re short, clumsy, never did anything right and you always, always spills your drinks on me everytime you’re holding one when I appear to be around you! I wonder how did you manage to survive until your final year in your university. Might as well call them to ask them for a refund.”

Will their love-hate relationship blooms into something more? Or will they keep on hating each other?