Comments of chapter undefined of Marvel With Zanpakutou

So it's true that Hollow appeared before MC was reincarnated in this Marvel world... The problem is, is it before the MC or is there a plot like the MC going back to the past or what could be called a time paradox 🤦‍♂️ To be honest, I'm always confused if the story is related to time paradoxes, time loops or anything related to changes in time