Yeah, i mentioned it back in 6.2 that the pace of this shit was so bad, that it was likely to end in less than 20 chapters, and it did, but yes, manga been rushing a fuckton, mostly because it skipped almost every internal monologue so alot of things don't make any sense, i haven't check the manga raws for the ending, but it probably got rushed the fuck out too (and who knows if the volume gonna have an epilogue, or get translated if it do)