Redraws. So, so many redraws. Plus it was the winner of a oneshot competition, which meant it got the oneshot published in Young Ace, then another three chapters as a short series, then it was so popular that it was extended to a full, two-volume series, and all that really means is that it got color pages thrown at it like candy. But yeah, mostly the redraws. The "previously on" pages are absolutely freaking hilarious though.
I keep telling myself I'll finally do the next chapter, but then I want to finish Gamma, then there's Hitoribocchi, then Akame comes out and gets my full attention, then someone offered to pay me to do that series about the guy with a gun for a penis that I was planning on doing anyway but yay money... Catgirls just can't demand my full attention anymore, no matter how much I may want them to. Still, might try and do it in the near future.
