Lee Yunji : Yunji is perfect. At least that's what everybody thinks.  She studies at a top school. She has perfect grades, she's stunningly beautiful and she's also very talented in many aspects. What more could somebody wish for? But Yunji is also the daughter of a gang leader. Not just any gang leader, but the gang leader of the largest gang in the whole of Korea. The Lee gang. Her father treasures her more than anything and listens to everything she says. Underneath her kind and gentle appearancr, she is actually like her father, exactly like a gang member. She, being rich, can afford anything she wants, but surprisingly, haven't experienced real love before. 

Jang Dongwoo: Dongwoo is poor, doesn't have any parent. He's a gang member of the second largest gang in Korea. The Kim gang. Although his results are only so-so, his gang leader chose the youngest gang member, which is him, to go into the top school to be an undercover. Dongwoo never experienced real love because of his status and 'job'. 

Infinite (Excluding Dongwoo): all of them are part of the Lee gang and are currently students of the top school. 

Other characters will be introduced in the story. 

Plot: 

Being the daughter of a gang leader isn't easy. Much less say the daughter of the gang leader of the largest gang in Korea. Life isn't  as easy as it seems for Yunji. Although she might seem kind and gentle , she acts like how a daughter of a gang leader should outside school.  But when Dongwoo is being sent to her school to be an undercover, everything is turned upsidedown. It is known that a few of the most important members of the Lee gang are currently hidden in that school. In order to take down the Lee gang, those people in the school are to be discovered by Dongwoo and taken back to meet the Kim gang's leader. Will Dongwoo be able to do it after all? Or will he and Yunji fall into a web of troubles and love?