DXD: LPA System

A child after losing everything awakens a system.

“LPA? What's that?”

[Literally Plot Armour, Host.]

Can a child that is given a system take on revenge on those who have taken everything from him? Read and find out.

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A few warnings, first of all my mc isn't a reincarnated person and doesn't have knowledge about the dxd plot, so don't expect him to do things that many other mc's do by knowing the plot, unless I plan for that event.

No yuri
No ntr
No clone sex or things similar to that.
The genre is harem but Mc won't go and collect all girls and each member of the main cast like Pokemon.
There will be world travel so if you want a fic that is solely focused on dxd then this isn't what you're looking for.