Ken-cha~~n! <3
Playing with coloring techs, here's somewhat cel shading or smthing like that :P

Kouken is still a boy :)
Crimson is more angular and rougher wheres Kouken is softer and well Mr. Nice Guy.
Kouken (c) Tien-Kun, 2009

(I suggest downloading the original size, the otaku standard shrinks this and makes the lines all blurry :()