A few days ago, The Boss released the first teaser for their new single "Lady." Today, The Boss releases the second teaser through their agency, Open World Entertainment’s YouTube Channel. It has been announced through the group twitter. In the one minute teaser, we can listen a bit of the song. It is a ballad song and showed the boys vocal capability. We can feel the sad and bitterness emotion that portrayed from their voice. They have transformed from cute friendly young boys to mature young adult with this teaser.