Idol girl group�Girl's Day (Sojin,�Yura,�Minah, and�Hyeri) has returned with "Don't Forget Me"!

Dream Tea Entertainment told�allkpop,�"The concept this time around is sexy and feminine at the same time. To express their new sophisticated concept, the group chose the color black with spots of youthful color to be mixed and�matched�into their looks. It's also the fall season which is perfect for a more mature image and music style."

It has been six long months since their last activity with "Oh My God".

Meanwhile, check out their comeback stage below!