More of this?Where is it from?
Requests go in /r/, but I'm in a good mood so I'll help you out.It's a colored version of the attached lineart by Takuya Inoue. Exactly what magazine or book your photo depicts is unknown.
Sketchier versions.
Another Mai pose from the same Inoue B&W dojin.
Same dojin, more Mai.
And the cover to the dojin. Note that all of the above is not the same book as what you've got there, OP.