Accounting for Love (2017)

A nerdy young man named Kevin meets his dream girl Amy in a bar and luckily gets her phone number. However, because he doesn't think he's good enough, he tries to get rid of the bookworm figure he has by throwing away his books. While doing so, he accidentally loses the book with Amy's number in it. He tries everything to get the book back but fails, only at the end to find out, Amy actually feels the same way about him all along.