Someone pointed out the other day that Nero's Boobs is bigger in the manga compare to her Concept art, so here's a comparison between the two (Also little sneak peak into Chapter 3 X9 )
I think it's mostly due to my style changing, back when I drew her concept art I was still going for the super cartooney style, but now I think my style is a bit more realistic so a lot of body parts got bigger (Neck, legs etc.)
I'll probably have to redraw a new up to date concept for art Nero anyway though, so it's fine XD
P.S. ....Still not as big as Kloa's ( ͡ ͡° ͜ʖ ͡°)