He has scars on his back because... Nah, I can't say anything without spoilers. :/ Whoops.
I just love my winged boy <3 he's probably my only nOrMaL sOn. Except for Sushi-san. Who is that? Oh, well, maybe he'll be in the book... Just maybe...
This is an older drawing compared to the one before it. Still, it's not bad.