On March 31, Brave Brothers released two teaser images of the group, revealing the two concepts that the group would perform with.
On 7 April, they released their debut single album The Difference, along with a music video for title track "Do You Know".
They then made their debut on KBS's Music Bank with promotional tracks "So Sexy" and "Do You Know".

On 24 April, Brave Girls appeared on KBS's Gag Concert and performed a trot version of "Do You Know".
Additionally, Eunyoung appeared on KBS's 100 Points out of 100 and won 2 medals (gold and bronze).

A music video for "So Sexy" was released on 8 June.

Brave Girls also made a cameo appearance with Superkidd on the SBS drama, Protect the Boss.

On 22 July, Brave Entertainment announced that the group would make a comeback during the same month, and shared concept photos of their mini album Back to da Future.
Their title track, "Easily", featuring Korean reggae artist Skull, was released along with the music video on 28 July.
Brave Brothers stated that the song was homage to Kim Gun-mo's "Excuse".
The full EP was released on 29 July and peaked at number 14 on the Gaon Album Chart, selling 1,606 copies.

The group participated at the 3rd Idol Star Athletics Championship on September and, on 3 November, made a cameo appearance in Mr. Idol with Chocolat and various other idol groups.
At the 19th Korea Culture Entertainment Awards on 15 December, the group received the "Rookie of the Year" award.
Following this, on 25 December, they appeared on KBS's Let's Go Dream Team!
as special guests, and performed for contestants on the show.
On March 31, Brave Brothers released two teaser images of the group, revealing the two concepts that the group would perform with. On 7 April, they released their debut single album The Difference, along with a music video for title track "Do You Know". They then made their debut on KBS's Music Bank with promotional tracks "So Sexy" and "Do You Know".
On 24 April, Brave Girls appeared on KBS's Gag Concert and performed a trot version of "Do You Know". Additionally, Eunyoung appeared on KBS's 100 Points out of 100 and won 2 medals (gold and bronze).
A music video for "So Sexy" was released on 8 June.
Brave Girls also made a cameo appearance with Superkidd on the SBS drama, Protect the Boss.
On 22 July, Brave Entertainment announced that the group would make a comeback during the same month, and shared concept photos of their mini album Back to da Future. Their title track, "Easily", featuring Korean reggae artist Skull, was released along with the music video on 28 July. Brave Brothers stated that the song was homage to Kim Gun-mo's "Excuse". The full EP was released on 29 July and peaked at number 14 on the Gaon Album Chart, selling 1,606 copies.
The group participated at the 3rd Idol Star Athletics Championship on September and, on 3 November, made a cameo appearance in Mr. Idol with Chocolat and various other idol groups. At the 19th Korea Culture Entertainment Awards on 15 December, the group received the "Rookie of the Year" award. Following this, on 25 December, they appeared on KBS's Let's Go Dream Team! as special guests, and performed for contestants on the show.
Brave Girls