Last time we learned never to underestimate time. Well in this episode, we learn that you should really consider the details if you don’t want to screw up anything years later. In Araragi’s case, he could’ve prevented the zombie apocalypse.
Araragi knew that saving Hachikuji’s life would prevent her from being an oddity and never meeting Araragi in the future. What he didn’t remember is that by eliminating his relationship to Hachikuji, her appearance in finding Shinobu during the final events of Bakemonogatari would not happen, thus leaving Araragi to be killed by Hanekawa and Shinobu on a mindless rampage.
But really all that complicated time travel nonsense isn’t the real focus of this episode. It’s actually focused on a single aspect of it; Shinobu’s restraint being dependant on Araragi. We still don’t know all the details of their relationship(need to wait for Kizumonogatari), but the events in this episode are the best proof we have in guessing that their relationship is strong.
In previous cases, all we’ve gotten from Shinobu is that she’s saved Araragi multiple times while playfully teasing him whenever she gets the chance. But here she explains that her time when she ran away from Oshino could’ve caused the world’s end, and that it was solely dependant on if Araragi chose to find her. If that’s not enough, then her dozen apologies to Araragi for the aftermath counts.
The rest of this episode is pretty much Araragi & Shinobu replacing Will Smith in “I am Legend”. They wander around in an abandoned costco, walk through every empty location they can think of, and even have their own small fireworks festival(They even get dressed in Kimonos). These moments provide some light-hearted amusement other than the dialogue, which was definitely a good choice considering how lonely their predicament is.
Despite this being Hachikuji’s arc, the majority of these episodes thus far seem to have been focused on Shinobu. I get that Hachikuji’s disappearance is a major part of the plot, but she’s really lacking as it is now. The stuff with Shinobu is great, and it’s actually one of the highlights of Monoagatari in general. But I really hope we get more on Hachikuji later.