I have no movies for you, but here are some possibilities based off real things that either happened to me or someone I know personally:

01. Muse A goes ice skating and despite not being good, they try to show off, Muse B is a medic and comes to help because they end up breaking something.

02. Muse A and Muse B are playing romantic interests in a Christmas play at a local theatre and by the end of the run, they have fallen for each other.

03. Muse A is stuck in a shop because a blizzard hit and they have been snowed in, Muse B is a tired shop worker who really doesn't want to hear you complain about being stuck there so they try to keep you entertained.

04. Muse A used to live at Muse B's address and so Muse B keeps getting their mail. During the holidays it gets worse due to all the packages and they finally confront Muse A because enough is enough. Muse A finds it all hilarious.

05. Muse A and Muse B are both parents, or have children they care about, and are literally about to throw hands in a shop over the last Toy of the Year™