Japanese people love their time-looping/multiverse settings but too bad most of the time they don't make any sense at all. Example: A character left the universe, causing their history to be erased, thus everyone forgot about them.. except the protagonist! Headshotting logic right between the eyes. Example: Protagonist must travel to other universe to help the character come back, even though they already have everything they need.. Yes those are both from Gnosia the anime, and its list goes on.

Another work I recently read that sent all logic to hell was the infamous Bunnygirl senpai. Now that was complete trash: Pretend to be brainy sci-fi then violate everything you just explained LOL to keep the story limping forward. If there's one lesson to draw from such failures it's that time-loop/multiverse nonsense has an overwhelming chance to undermine and kill a work, and a tiny percentage that it will make it better (*cough* Higurashi *cough*).

Of course, the teenage target audience rarely cares or even registers the dissonance. To them the story acts like a drip infusion of spectacle and (hollow) drama.