It is indeed fairly short. On the other hand, it seems like about the right length—it explores the ideas it wants to explore fully, without feeling rushed, and then calls it a day.
Also, indeed, the premise is nothing new, but it gives the usual story a good shaking out and avoids some (not all!) of the more cringey bits that often come with this premise. Overall, I'd say it does pretty well. A short, fairly sweet, fumbling-love story.