JJ Project just debuted with their song Bounce. I have followed the blond guy (JB), since Dream High 2. So it has been fun to see more of him. For Jr. I do not know much about him. I know that he made a small CEMO on Dream High 2, the drama that JB was one of the main characters in but otherwise I have not heard anything more from him.
It will be interesting to follow and see what becomes of the group. :)
Note: If you press the CC button the English translation will show up. It's not the lyrics but rather the whole meaning of the song. :)