A new life in High School DXD

https://www.webnovel.com/book/a-new-life-in-high-school-dxd_12869856606783205

This is a young man of twenty years who was reincarnated in High School DXD carrying with him a system to ascend beyond its limits.

The first time I make a fan-fic note is that some characters will not be present.

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The High School DXD does not belong to me, nor any character.