Longer than the author's previous axed rush-ending works, Eden on Ori and Deathtopia. The difference is there is a lot of p0rn in Satanophany to keep the readers wanting more.
Hotaru did the right thing, that subhuman bastard would've eventually reached Hotaru if she didn't kill him. He would've never changed for the better.
In a way, I think Hotaru is more mature than Asuka.