015B revealed their�project single and music video teaser for "Let Me Go" on May 30, and since then, the track has been climbing�music charts.

The group has always attempted a different concept and image for each of their comebacks, and with this new single, the group reminded fans once again that they've been in the industry for 20 years.

With "Let Me Go",�015B will be returning as honorary rookies for the first time in six years. The group will be bringing back synth rock, a music genre trendy during the 80s-90s that utilizes electronic instruments and a powerful guitar sound.

The duo is showing a new style with their bold, realistic lyrics for "Let Me Go". Their blunt lyrics have been receiving many responses. Some of the lines are: "I feel like throwing up from just seeing your face," "Let's just say I once stepped on something wrong," "Please get out of my sight," and "This is the story that I wanted to tell."

015B's attempt at the new music style has received favorable responses such as, "Realistic as always," "I love how the lyrics are straightforward and extreme," "Their sound is different from others," as well as negative responses, "The change is very strange," "I have been a fan for twenty years, but this is different from my expectations," and "I was looking forward to something sentimental so I'm disappointed."

In related news, 015B will be participating in the '2012 Rainbow Island' concert, which will be held on June 9 at Nami Island in Chuncheon.