Nega Network released another teaser for their upcoming boy group and it features none other than�Brown Eyed Girls' Ga In working on what seems to be a song.

The agency explained that the mysterious teaser is�"a video with a hidden secret. There is an element of fun to finding the hidden pictures."

If you need a hint, this has to do with the upcoming boy group who is at the moment going by the nickname of�'Brown Eyed Boys', and is set to debut on May 9th.

Watch the teaser closely and see if you can spot the hidden secret! If you really can't figure it out, click here to see what has been hidden!