Being Reborn With The Anime Power System

Being Reborn With The Anime Power System,

A story about a man reborn with a system with certain functions.

World's he will travel to
(Akame ga Kill)-Now
(Highschool of the dead)-Next
(Blue Exorcist)
(DxD)
And more (suggestions please)

Maybe harem members
-Leone(Mc Reincarnated Wife from a past life)
-Akame(Maybe)
-Najenda
-Esdeath(Probably)
More when I remember their names!;)

This is my first book so I would like some feedback on how the story should go and there might or not be a harem in this.

I did this on a whim if the feedback is good then I'll continue with this story if not then I'll stop hope you enjoy:)