They couldn't take it anymore. Where had the good stuff gone? Also: they really didn't want to work. They are musicians. They don't sit at a desk, they sit on a couch (black leather couch).
Thus NAT BANA was made. It consists of Mick and Valentin. Mick is essentially playing the instruments while Valentin is doing some great singing (Yes we know Valentin, you played the guitar on "Aftershow").
Who are they though? Check "Who?" to find out.