On March 24th, rookie group BtoB released a practice video from before their debut through their official Daum Fan Cafe that has caught the attention of fans.

The video contains BtoB's "first behind story" which includes�their practice before debut and the struggles they have gone through in order to chase after one dream, to become a star. Through the footage, BtoB expresses that they have "pressed a new play button in their lives" and showed their sincere determination.

The group performed both their double title tracks "Insane" and "Imagine" for the first time on Mnet's 'M!Countdown' on March 22nd, followed by KBS's 'Music Bank' on March 23. Through these two performances, BtoB has received positive feedback for their charisma filled stages and their powerful dance choreography.

BtoB's first track, "Insane", is a song that was composed collaboratively by Seo Jae Woo and Seo Yong Bae. The two composers have also direced the boys' concept, as well as assisting in being their vocal trainers.

Aside from "Insane", the group has also received high praise for their ballad performance for "Imagine". With a dramatic dance choreography and a powerful and sensuous melody, the group has proved to be worthy of the title, "super rookie of 2012".

BtoB will be performing their title songs, as well as a special performance, on MBC's 'Music Core' on the 24th, followed by their performance on SBS's 'Inkigayo'.

Check out their pre-debut practice video below!