worldbuilding / self-lore
time travel exists in Kaito's world but it's useless for all the things you'd probably want to use it for
you could, in theory, load a backup of the entire world into a separate instance of the world's "program" and explore it
but not only can you not guarantee that the actions that occurred in that sub-world after you started running it were identical to what happened in the "canonical" version of events
you also obviously can't make any changes that would propagate
your traditional sorts of magic do exist in Kaito's world
it just turns out that they're programmed in to either the world itself or objects/people within that world, nonstandard actions or series of events that have responses or effects other than the expected norm