The Fantastic Adventure of a God in Tensura

Disclaimer: This story is entirely my property, the characters credit their original authors ... Before the founding God of Tensura also known as Veldanava died, he left his remains in a secret and inaccessible pocket dimension. In that pocket dimension hides an infinitely powerful power, capable of destroying the Multiverse, Milim Nava, the daughter of Veldanava, would be automatically teleported to that pocket dimension where she would absorb all that infinite power. But... What would happen if a totally different person appeared in that dimension? Does that person have malevolent purposes? Will he choose the path of good or evil? Will a harem be built?