エンド・オブ・ザ・ワールド!! is katakana, it legit is "Endo obu za Wārudo!!"... still learning my japanese so I know I might make some mistakes, but that one I'm quite confident on... Even if I'm not sure why it's called that.
LMAO. no no no, the final chapter is already out and published in Japanese. I just haven't worked on it yet. What a hell of a tease. people wait 11 months for this chapter, then wait another 11 months for the final one.