Lee Chaerin

A playful girl. She likes to shop- A LOT!  Because of her previous broken hearted with his boyfriend she didn't want to date another guy. She decided to wait for her half to make a move on her meaning PROPOSE and MARRIAGE. That's what she said to her friends and other guys that she turned down. And of course some did say they will but never did took any actions. 

Then, one day her parent says that their friend is looking for someone to be introduce to her son and she was the chosen one! Hesitated, they meet up and ended up dating and engaged! But things isn't that smooths as she thought it would be. Being stranded with a workaholic fiance and his two naughty and playful brothers making her work hard to get to know her own fiance. 

Young Bae

He was a workaholic, a hot guy but never dated before because of his busy work! When he first saw Chaerin, he falls for her head over heels and decides to propose!  But works gets in the way and he had to go overseas for a few months, leaving his fiancee behind. Once he came back, they are going to get marry. Lots of things happen behind his back that he doesn't know. 

Jiyong

Second last from all of the siblings. Very close to Young Bae and Seungri. He is single and available. Jiyong have seen Chaerin  for a few times but they didn't talk too much. He never knew that Chaerin would be his future sister-in-law till he came back after he finishes his studies and he meets her again. He tried to keep away from her but she is just hard to resist and avoid. He ended up teasing her and fool around her all the time. 

Seungri

Youngest of the three brothers. Still studying and currently dating a girl. He was always by Young Bae side and give him supports and ideas to enchant Chaerin. Little by little, his heart were swayed by Chaerin's personalities and he tried to stop himself from futher involve with his own feelings. Luckily his semester breaks are over and he went back to his campus and his girl. 

Minji

The youngest sister. Very problematic. Like to dance so much that she didn't bother studying. her older siblings always nags at her because of her carefree side. Not till Chaerin comes into the picture. She starts to stick to Chaerin and be her BFF. She also could sense something between their brothers about Chaerin.