Sungmin was only 4 years old when her parents were killed right infront of her. 11 years passed Sungmin still seeking out for revenge, when she was in highschool as a teenage girl she made friends with Kyuhyun , Ryeowook , Yesung , Donghae , Eunhyuk , Seohyun , Tiffany , Jessica , Yoona and many more. But that one day change her....

Lee Sungmin
- a sweet little girl who loves to prank people during her free time, she cares the people around espeacially the closest people that she love.
- her dark personality can kill about 9000 people while her caring personality can only kill about 3 people.
- she boards at Kyuhyun's house.
- her bestfriends are Ryeowook , Eunhyuk , Seohyun ,Tiffanny , jessica , Yoona ( at first friend then after some stories she became her rival).
- she is a black belt in martial arts.
- she is very good at handling her katana and her guns.

Cho Kyuhyun
- the school's popular and dont forget the most handsome prince at school.
- his personality is rude , cold , rarely cared for others , never missed a change to say any vulgar words.
- he is very good at math and at videogames.
- he gets easly annoyed to Sungmin
- he once burned down the whole cooking room, his reason was ' It wasnt me! '
- he and Sungmin met when they were little. But somehow he forgets her.
- his bestfriends are Donghae & Yesung.

Pairings : KyuMin , EunHae , Yewook