Woo Jiwoo / WJ (20)

Jiwoo is a Popular Tomboy at college. She is known for her kind-heart but boyish way's. She was left alone with her parent's when your Younger brother left. Her older brother? He is no-where to be found.

What people don't know is behind Jiwoo's Smile is a broken and tattered Girl. A Girl with a deep secret. A Girl that could shatter everyone. She is Dangerous.

Though her bothe's aren't around. She never blamed them from escaping the horrible life they lived. So, When she realize's it's non-other than her brother's that have kidnapped her. She is more than confused.

Woo Jiho / Zico (21)

Zico ran away from home when he was 18. In the 3 year's he was gone, He built a gang, Block B. Thinking of the safety of his younger sister, He and his Older brother join their gang's together to kidnap Jiwoo. Only when they get her, They are surprised, Not once, But twice.

First, She was a tomboy. Though it fit her boyish name, She had lost her elegant and Pretty, Girlish self.

Second, As soon as they had her back at the Block B/ SPEED House, They took a proper look at her face and realized. She was the Solo Gangster they were afraid of. She was WJ.

Woo Jiseok / Taewoon (23)

Taewoon is the Oldest Brother and Leader of SPEED. SPEED Is a gang he built when he left home at the age of 15. He was upset to leave his Younger sibling's but...

When his brother come's and find's him, They set up a plan to grab their younger sister while their at it.

When Jiwoo is in their hand's, He just like his younger brother is shocked with who their Sister is.

 Block B

SPEED

Both Gang's Apart From Taewoon, Zico, U-Kwon and Sungmin think Jiwoo is a Guy.