 If you liked
Akame ga Kill!
|
 ...then you might like
Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka
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Similarities:
+ Dark action/fantasy manga centered around groups of people fighting against each and again monsters
+ Similar art styles and character designs
Differences:
- Akame ga Kill is much gorier and darker with a larger character cast
- Dungeon is more like an MMORPG style world (though it's not a game) with dungeons as well as a harem aspect