Lee Jae Won's MV for Say My Name. This was available on both the Extension extra and limited edition No Pain, No Gain DVDs. It's just a collection of many happy clips of Jae Won, from practicing, to signing stuff, to the making of NPNG, and anything else thrown in.

Yes, this is indeed one of the many songs Jae Won wrote about himself and his life.

J to da A to da E to da Won ♥ (less info)