Ladies' Code debut in March 2013.

Promotion began on February 25, 2013,
with the release of Rise's teaser video.

Followed by Sojung's on the 26th,

EunB followed on the 27th,

then Zuny's on the 28th,

and March 1 for leader Ashley respectively.

On March 4, 2013, they released the group teaser for their music video.

Ladies' Code (레이디스 코드) - Bad Girl (나쁜여자) MV [Eng Sub] HD

The group's debut mini-album Code#01 along with the song "Bad Girl" and accompanying music video was released on March 7, 2013.

Just the day after their debut, their song charted high on real-time charts, peaking at #8, #9, and #10 on Soribada, Daum, and Naver real-time charts, and eventually peaking at #34 on the Gaon singles chart.

They had their first live performance on M! Countdown on March 7, the day of their debut.

LADIES' CODE (레이디스 코드) - Hate You MV

Their first digital single "Hate You" was released on August 6, 2013, serving as a pre-release for their upcoming mini-album. The song debuted high on real-time charts, peaking at #3, #8, and #11
on Bugs, Mnet, and Cyworld real-time charts.

On August 21, 2013, Ladies' Code announced their comeback for their second mini-album, Code#02 Pretty Pretty, which was released on September 6, 2013.