KNK (in various versions) is the name of more than one artist:
These are photos from concerts where KNK played, so they may be of other bands that played the concert as well.
MBC Show Champion Sep 3, 2016 Pasay, National Capital Region, Philippines Uploaded by Raineisfalling
MBC Music Show in Manila Sep 3, 2016 Pasay, National Capital Region, Philippines Uploaded by Mmyreligion