Pornstar name?

monohorn is correct that it's Anri Okita, but as for the actual video, it is in fact from SOE 607, part of the introduction to the first scene.
You can find official info here:

http://www.r18.com/videos/vod/movies/detail/My-Naked-Teacher-is-Too-Sexy-to
-Study-Anri-Okita/id=soe00607/

And less official info here:

monohorn is correct that it's Anri Okita, but as for the actual video, it is in fact from SOE 607, part of the introduction to the first scene.
You can find official info here:

http://www.r18.com/videos/vod/movies/detail/My-Naked-Teacher-is-Too-Sexy-to
-Study-Anri-Okita/id=soe00607/

And less official info here:

That's Okita Anri - looks like it might be from this vid PPPD-288: