On October 16th, 2009, Yoon Doojoon, Jang Hyunseung, Yong Junhyung, Yang Yoseob, Lee Kikwang and Son Dongwoon debuted under a boy-group named B2ST / Beast. 

Their first mini album titled 'Beast is the B2ST' included the songs Beast is the B2ST (their teaser song), Bad Girl (their debut song), Mystery, Not Yet and Oasis. 

When Beast first debuted, many people called them a recycled group because four out of six of the members had already debuted or were about to debut with another group.

(Doojoon with One Day aka 2AM & 2PM)
(Hyunseung with Big Bang)
(Junhyung with Xing)
(Kikwang as solo singer AJ)
 

I don't belive they're a recycled group. They've all been through so much that they deserve to be in a group. If things didn't work out the first time for them, it's because something better was bound to happen. 

During the time that they were still rookies, Beast had many rivals such as MBLAQ, f(x) and even their own lable mates, 4Minute. It's amazing to see how six boys went from little rookies to the top of the charts in such a short amount of time.

Thank all of you six boys for pulling through and teaching all of your fans to never give up. Thank you for teaching us that if we want something, we should go for it, and not give a damn about what anyone else says. 

I'll always look up to you. I'll never leave any of you. I might not have been a B2UTY since the beginning but I will be until the end. I have everlasting love for each and every one of you.

"I want us to be like this for a long time. This is what I tell the members all the time, 'Let's have fun together as long as we can.'"
--Doojoon

"Never give up, look forward to the future and don't give a damn about haters."
--Hyunseung

"We've met like this, so let's be friends until the end."
--Junhyung

"Everyone has something they want but Beast moves together as a group."
--Yoseob

"I can't live withought Beast. I'm really grateful."
--Kikwang

"We want to be a group that continues to go up without any stops and continues to improve."
--Dongwoon

"The biggest encouragement comes from the fans' love and support."
--Beast