Takana Yuuki was a guest at one of the vendor's booths at AX. This particular vendor features his work on their products including cloth bags, shirts and mugs. DrScorpio alerted me to the fact that Takana was accepting requests, so I went to the booth and asked. I attempted to pay him for the sketch, but he wouldn't accept it and I bought a shirt from the vendor instead.

Check out DrScorpio's sketch of a girl before you leave ♪