Is it Wrong to Try to Climb to The Top From Danmachi? (AU)

What if...an unknown soul with a special kind of power and unlimited potential met an almost omnipotent problem child. What if...that problem child gave that soul a second chance in exchange for being her ally and knight... What if...that unknown soul accepted that deal and embarked on a journey to the peak of creation... Read this story and you will know what would happen in the story of that unknown soul while he goes across worlds getting lovers, getting stronger, and doing whatever he wants. *** There are OC characters and the Worlds will be AU worlds, something like parallel universes of the original worlds. *** Worlds planned for now:Danmachi, Tower of God, The Second Coming of the Gluttony, Saint Seiya, Mondaiji Tachi,Shuumatsu no Valkyrie. Maybe some of Xenoblade chronicles, Honkai Impact, or Fate series? You can recommend interesting worlds in the comments or reviews, I may add some of those recommended worlds if I see them interesting. *** Warning:this will be a harem type of novel with several smuts/R-18 contents at some points of the story, if you don't like it, don't waste your time here bro. *** Warning:to facilitate my writing of the plot at some points, also due to a request said in a certain comment and as a personal decision. Several characters that were originally men will be female in this fanfic, although I plan to do this on only a few characters for now. (Bell cranel, Welf crosso, izayoi Sakamaki, and several characters for example ) (Personalities, pasts, and objectives will not change much beyond Bell looking for a hero instead of looking for girls in the dungeon) (Instead of treating it as a forced gender change, treat it as an alternate universe/parallel universe, as the title says, AU) (And Freya's story and character will change a bit too) *** Disclaimer:This is a work of fiction and I do not hold anything of Danmachi or other stories in this fanfic other than my original plots, characters, and their backstories.