Alternative Title: Akame ga Kiru!

Type: Manga
Volumes: 6 and counting
Chapters: 30 and counting
Author: Tashiro, Tetsuya (Art), Takahiro (Story)
Serialization: Gangan Joker
Genres: Action, Adventure, Fantasy

Synopsis: Tatsumi is a fighter who just got robbed by a pretty girl, but his luck seems to be looking up, as another pretty girl has taken him in. What he doesn’t know is that this girl is about to be visited by a family of assassins (including the girl who robbed him) and they might be the good guys, and be recruiting...

Resources: Mangaupdates | MyAnimeList

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IAnimum Mutare - Chapter 31

Just some awesome dystopian setting with plenty of blood, death and gore centered around a badass protag with a harem building around him. Oh and there's super powers too.