You sure have a nice bishie face!
Yes. I would say you could DEFINITLY pass as Natsuo, and a light version of the basic FtM makeup would help you. ^^ Just a slight version because if it was too dark... you'd look much too old. xD Like a 20 year old Natsuo pretending he's a tween. (Which is an interesting idea... hmmmm.)
You might want to look around this forum for FtM makeup advice. Not being oh so elegant with words, I might tell you the wrong thing.
I would LOVE to see the results of any such test! Post here when you try it, please~!