This short film is based on a short story by Lev Grossman is a repeat-the-same-day romcom that uses 2D projections of a tesseract as a plot point! I liked it even if it’s a little handwavy, and math also comes up as a conversation topic for the nerdy characters, with a subplot of learning algebra while they’re stuck in the loop. As a high-school geek, I really enjoyed the romance sprinkled with numbers, and it was wholesome enough for everyone else to enjoy it too! I’d rate the math content at a 2/5 and quality as 4/5.

So the first thing that you need to know about math is that it's always perfect.