I haven't personally noticed Ishikei's art change that much.
Aside from major anatomy fixes since his first doujins. (Characters had too many joints in wrong places)
Then again, I'm quite blind to how art works. I can still think of a few artists whose style change more dramatically in a year though. Mitarashi serves a good example I thought.
I- It's not like I'm wet or anything!!I mean, who ever heard of a Brigade leader getting wet over one of her Brigade members?The pool!!
That's it, the pool!!
I fell in the pool is all.
Just my panties did!!!