New member, first post, first photo. I'd love some feedback!

Hello fellow Fstoppers. I subscribed very recently to this website and finally decided to post something, afeter a few days of browsing.
I'm Guillaume, french guy living and working in Tokyo. I'd love to make photography as a living, for now it's part of my job, but not as independant :) But i also enjoy it as a hobby, so here's my first photo i have to show you.
This is one of my latest one, and i'm pretty happy about it, and that's the problem ^^ I need to know what's wrong and what could be improved.

So please roast me :p

Guillaume