[vector] Yui and Ui

Due the limit of 10 millions pixels for Indy Art category, I could not submit into MT the source resolution what I worked with, but even the smaller version is enough sharp, so don't worry. Of course DeviantArt gets the full version. Did I really made a K-On vector now? Whoa...thats odd. Anyways for the growing age of this submission I removed all credit requirements, so is now free to use.