This is beautiful.
Your technique it's perfect, I can not say anything bad about it. You perfectly know how to use SAI and CS4.
The color technique is really graceful and pretty, it's perfectly suit Eichi!
The effects are so.. Woah, alive! It shines, powerful and it adds depth to the drawing.
The background, deeply worked is awesome, from beginning to end! I saw your speedpaint and woah, really, that's amazing haha.
Hmmm, that's a lot of good things that I said. Something wrong? Mmmh, maybe adding more depth to the skin color? Like, under his neck, on his lips.. I don't know. But however, it's still beautiful. Keep working, you're amazing.
And I'm sooo happy to meet and see people and their work, loving Ensemble Stars! haha!