To be honest I'm suprised how little hollow story's there are anyways
Tags will be
Reincarnation ( not in the way you think )
Bleach ( uh duh )
Mha ( uh duh)
Harem ( maybe if so only like 4 or 3)
Op MC ( Welp can't right any character without them being op )
And that's it at least at the time of writing this
So the Mc starts in hueco mundo as an aduchas class hollow and gets stronger by eating random fodder hollows then finds a friendly hollow cat who is a aduchas class hollow and some random shenanigans happen like mc fights baragon and iki I don't know how to spell the full name so i sortened but if you go on YouTube and search up hollow zanpaktuo watch that it should be enough to know what I'm talking about but if your lazy let's just say that iki is the strongest hollow that even baragon respects that fought the soul society and lost because they got sealed in a zanpaktuo by the zero squad and it can only be weilded by people strong enough to be the soul king
Anyways after finding somthing that lets him gain somthing akin to gate of Babylon but much more strong and versatile and his friend who I guess could be named katsu ( idk what to name her tbh might changed it if one of you guys gives me a better name ) become something beyond arrancar they then wander hueco mundo to find hollows worthy to be apart of there family which they find haribel and her fraciones starrk and lillinette neiliel and maybe grimmjow and ulquora they also make them evolve to there stage which I have yet to name then they might ether travel to the living world which won't have quirks yet or go to soul society also ether way they gonna get chibied so they blend in with random orphans some more stuff happens but my device is low on battery so I can't say much more if your interested please do say I this might be my next fic anyways cya next chap