does anybody know the artist?

The artist's pseudonym seems to be "YS11" as seen in the right corner of this image on Asuka's lower leg.

It's Sadamoto Yoshiyuki. For a production art guy, some of the stuff he's drawn is pretty racy. There's an Hikari-Asuka picture out there where the two of them are all but nude, yuri, and sixty-nined.

I found and uploaded the Hikari-Asuka pic here: post #100548

Okay, the post 100548 was removed why?

Okay then, if there is some copyright issue with the Hikari Asuka sixty-nine pic, (It's been deleted TWICE now,) why are ANY of Sadamoto Yoshiyuki's pictures posted on Danbooru?!? And if it is a matter of his hentai stuff not being seen, why are THIS picture and that picture of Misato and the 'Black Forest' on this site?
I understand that there is a 'no explaination' rule about posts, and I agree with copyright concerns.
However, taking into considering that copyright questions might exist, and that various other things on this site might have questionable natures, can someone PLEASE explain why the Hikari/Asuka sixty-nine picture is not a permissible picture!?!