who drew this? the guy that does yankee-kun to megane-chan?

吉河美希

Since the signature looks very similar. I'm gonna say yes but not gonna change tags unless someone else knows for sure.

Seriously, explicit? Where's teh vag000? No p0n0s either? Oh noes! Time to pull out mah h4x and set us up the SAFE.

Yes, http://www.bakemonogatari.com/special/ confirms that this is Yoshikawa Miki (who, incidentally, is a woman).