I think this is one of the most amazing fanart of DN I've ever seen. They are actually nearly even better than in the manga itself ! Your alternate smoothly between soft curves or shadows and solid angles and sparkles.
Not only do you have amazing drawing skills, you obviously master your colorizing app perfectly. I am totally fond of the colors, and the bodies of Kira and L, their face, all of this is stunning.
If the colors are great, what make this a masterpiece are the light and shadows. There are absolutely perfect, and original on top of that.
As a conclusion, this is an awesome piece of art. Bravo !