Does anyone know an amazing fanfiction, if it has multiversal theme going on then that's more like it. because I've been wanting something like Time Emperor (Champion), Boundless: An Anime and Comics Harem in the Most Dangerous Omniverse and No Otaku with Harem system (English version) If anyone knows this fics then can you recommend me something like it.

Or more of fanfictions like Darkwolfshiro's just as much dark and fun.