High School DxD, Akame ga Kill! Recommendations
While Highschool DxD is mostly more lighthearted and less openly violent than Akame ga Kill they both focus around groups of characters with special weaponry. Highschool DxD calls them sacred gears. Akame ga Kill calls them teigus or imperial arms.
Oh but word or warning, Highschool Dxd is far more fond of its characters than Akame ga Kill.
Both protagonists are dragged into groups with mostly females and fight evil.
These anime, although one is about demons and ones about assassins, are a little similar in my opinion because they both contain a but of fanservice but DxD sure has more and both of them have groups fighting one another,the battles just seem similar to me, and the main characters surrounded by a lot of females
Both of these shows are followed by a group of friends assassinating people, so if you liked DxD, you'd like Akame Ga kill. Lot's of suspense on this anime, it will keep you on the edge of your seat at times!