Huh, didn't think about it that way, but he could be about 2 or 3 thousand yrs old and the MCs age would not amount to 100 yrs (between both lifetimes), so still a little weird.
Although if you follow the whole reincarnation theory then mostly everyone is a reincarnated form of a another person, the difference is that they normally don't remember their past lives, unlike our MC.
But I get you on the ones where the original person died and the MC takes over their body (like in Shen Yi Di Nu, where a grown woman takes over the body of a 12 yr old.)
this thing doesn't bothered in other story but in here it does maybe bcos the other guys are so much older than Ijekiel, and Lucas being so much older even though he's asleep at that time is fine bcos at least both are adult.
and the whole reincarnation thing doesn't work like that in the story bcos if you don't remember it doesn't count so its different.
we all think kinda different so we all have different take/opinion ..
Kinda spoilery, but only if you haven't caught up with the last batch of updates. I really like that one of the love interests is also significantly older than he looks bc it's always a lil creepy for me when the MC is like haha I'm actually an adult and then gets paired off with a 14 year old. Lucas is a nice subversion or whatever.