You just have to accept its science-fiction or fantasy central conceit because there's never really an explanation, though nor should there have been, and, while its concept is often explored and does certainly play a large role in the narrative, 'Every Day (2018)' definitely doesn't otherwise occupy those two genres as it's deeply rooted in teen-romance territory - fairly realistic and grounded teen-romance territory, at that. It's obviously enhanced by the premise but not really dictated by it, despite the interesting and looming presence it has. The flick may sound like schlocky, sentimental fare but it is far from the sort and actually navigates it's unique narrative rather deftly, quickly getting you on board with its 'out there' elements and making sure that every incarnation of its body-swapping character feels like a proper continuation of the same person. It's never too predictable or clichéd but does usually play it pretty safe, aside from its satisfyingly ballsy and one-step-ahead-of-the-audience ending. It also doesn't go far enough in certain directions that may be tried-and-tested, but are only so for good reason, to compensate for the fact that it also doesn't quite stretch far into its newer territory to be anything other than surprisingly good for what it is, though. It's much better than I was expecting, but the core concept does feel like it could've been explored further. Perhaps that's something to be saved for another day. 6/10