

While she lacks self-confidence, Mi-young always sees the best in people and upholds a quiet strength. Because of her timid and kind-to-a-fault nature, she cannot bear to turn down a request from anyone and is nicknamed the 'post-it girl,' someone who is necessary but unimportant.

She has no wealthy family, prestigious education, or much beauty, but rather comes from a small island where her mom owns a small restaurant. Jang Na-ra as Kim Mi-young/Ellie Kim Ī naïve office worker at a law firm.Although he was shocked and reluctant at the news of a shotgun wedding, Gun starts warming up to Mi-young's sweet nature and pure heart.

However, he is genuinely warm-hearted and responsible, wanting to do his best for Mi-young and their baby.

Though utterly devoted and affectionate towards the people he cares about, Lee Gun can be cold, selfish, and prickly to everyone else. He is a descendant, the only one of his generation, of the distinguished Jeonju Lee clan, a lineage that has all the males dying in their thirties due to Huntington's disease. The wealthy heir to a large hair product company with a trademark maniacal laugh. When Mi Young finds out afterwards that she is pregnant, what will become of them? And will Kang Se Ra (Wang Ji-won) and Daniel (Choi Jin Hyuk) just stand by and let Gun and Mi Young deal with the situation in their own way? Kim Mi Young goes into the wrong hotel room because the hotel door number accidentally changes, and the door is propped open by the mischief-making drugged liquid makers. When the two cross paths one night after separately having drunk a drugged liquid a comedy of errors occurs. Kim Mi Young (Jang Nara) is an average-looking secretary in a law firm who earned the nickname “Post-It” for her inability to say no to her colleagues who dump work on her. Lee Gun (Jang Hyuk) is the successor to a large company run by his family.
