Tensei Inja wa Hokusoemu is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

An ordinary Japanese boy dies and gets sent to another world, where he is given incredible power by an omnipotent god and decides to use it to purchase slaves and create a harem.