10 Second Anime - Monogatari Series Second Season - Episode 10

Monogatari Series Second Season - Episode 10

Araragi and Shinobu meet 21 year old Mayoi who gives them a letter from Oshino on how to save the world. They do.

Well, that was an interesting take on the many universes view of quantum mechanics to explain time travel to the past. Basically, you can't travel backwards in time in your own universe, but keeping your time vector stationary, you can cross over to another universe's past, and then time travel forward from there. That's what Oshino's letter, passed on by an adult Mayoi, said anyway. But couldn't you pass over to your original universe's past from some other parallel universe? The answer is no, because the only other worlds you could enter are the ones where you can keep your time vector zero and cross over. Nice syllogism there, but that's math, not physics. In their rules of time travel, you can only stop time or go forward in the universe you're currently in; the other universes keep their own time. And, using this construct, reentering your original world from some other world is easy, because it's the one that's exactly that much time in the future or past that's different than your original. Cross-eyed sentence there, but it's logically sound. If you've travelled 11 years in the future while in some other world, just keep your time vector stationary again, and cross over to your original world, which had progressed 11 years naturally during that time. This works even if you've gone to the future of some other world. When you stop time and cross back over to your original world, it's always at the same time you left it. Pretty consistent.

I think it was all such a neatly tied up story, that Araragi and Shinobu saving this world from zombies was also the solution to going back to their own world. Getting enough power to cross worlds meant draining the blood of this world's version of Shinobu, who had failed in her attempted suicide, which killing her, would revert the zombies, which were failed minions because in her heartache over Araragi, she couldn't make a proper vampiric minion. Some nice scenes there with a full powered Heart-under-Blade (part of Shinobu's name in full vampire glory) still attached to Araragi, and needing just a simple pat on the head.

Seeing how their separation has global implications, Araragi and Shinobu don't seem to sweat it that much. A couple months of bonding was enough to seal their partnership. But I found it hilarious that the Oshino in the other world was incredulous that his Araragi started dating Senjougahara too. Unexpected and destined love in all the parallel worlds?