Byun Ji Sook has always had a hard life with her father constantly going into debt and being chased by loan sharks. She desperately wants to know what life is like if she was born into a better family and didn’t have to worry about money all the time. When a series of circumstances brings Ji Sook to Eun Ha, a woman from a wealthy family who strongly resembles Ji Sook, she grabs hold of the chance for a better life and assumes Eun Ha’s identity and begins to live her elite life. She meets Min Woo, a chaebol heir who is mistrusting of the people around him. But when he realizes that Ji Sook is not like the other women he has met, he is drawn to her. How long can Ji Sook keep up the charade and hide her true identity?
After learning that his ex-girlfriend has a fabulous new boyfriend, Hyun Seung spends his nights wracked with insomnia and jealousy. Then one night, a phone call from a sexy stranger breathes new life into his gray existence. Even with her enviable looks and a successful boyfriend, Yun Jung feels love deprived. While attempting to spice up her relationship, Yun Jung resorts to giving her boyfriend a steamy phone call… only to find that the guy on the other end is someone else and she just can’t quit him!
Playful Kiss is about a popular and genius male student named Baek Sueng-jo who has a stand-offish personality and Oh Hani who is a female student who makes up for being not-so-genius by always being smiling and happy. An earthquake destroys the girl's home and she and her dad end up living with the boy's family. The girl has kept this boy in her heart but she has never received any assurances of her love being reciprocated. Fun and groans ensue as they interact and rub off on each other. How will this drama end?