my prediction will be Human arc with Amelie's mom and she will meet Azazel again one way or another. which is why they added a story about her so it has structure to begin with.
Yes, the guy who is a prick against Okarun is back and didnt change themselves. Just keep him like that for a long while. We need someone who is just irredeemable at some point.
If only Otaku-kun is brave enough to face plant on those mountains, tch tch tch, our boy Shota wouldnt waste that opportunity or should i say, the fate wont lol.