Wait so, he doesnt want the current maize rn? He wants the old maize? Dang

Ehhh I thought he afraid the current maize will gone if the things repeat again.. ? Am I wrong ?

Not wrong

yeah i think he loves the current Maize and thats why hes so scared of her dying because if he loses this one he may never get another like her again. It seems like this is the first time he has had a relationship with "Maize" so I dont think he is thinking of a past one.

Exactly. She told him she is from another world, so he knows she is different. He doesn't know what will happen after this Maize dies, since she has a different soul than the one that keeps reincarnating.

So he basically said if this one dies and the story repeats itself again, he's going to crack. He knows she is special and her soul won't likely return.