The most beautiful face, the perfect body, and a sincere personality... that's what Hwang Hyemin has. Naturally, she's the center of everyone's attention. Every boy in her school loves her, while every girl hates her out of jealousy. Every single day, she has to endure tortures and hardships from the girls. There is nothing more satisfying than getting them back. Well, except for one problem: her secret crush, JongYon. Because of him, she has to hide her cynical and dark side and put an innocent face on daily.
For him, she has to endure all the jealousy and suffering.
Then one day, she found out that he dislikes her anyway!!
WHAT?!?
That's it! No more nice girl!
And her first victim of rage is a playboy she just met, MaHa.
(Source: ICE Kunion)

After her mother's death, high schooler Mi-Hyang packs up her belongings and enters the household of her mother's formal manager. Even though she was a daughter of a rich man, with her father and other family members still alive and well, she apparently has good reasons for doing this... So the life of smiling 24/7 Mi-Hyang and the two good-looking sons of her mother's formal manager -- with their own set of unique personalities -- begins!!

Although Gyu Hwa Lee might look like a guy, she has feelings like any other girl. In fact, she's currently in love with Korean pop idol Kang Un Ryu. As luck would have it, Kang Un ends up transferring to Gyu Hwa's high school. The only problem is he has to keep his identity a secret so he's cross-dressing as a girl!
Description from Condensation

Anji is the complete opposite of her beautiful, smart and ambitious older sister Anri. To make matters worse, Anji has a hopeless crush on Anri's boyfriend Baek-hui, who is her sister's match in looks, brains, manners and goals. But is Baek-hui all that he seems?