Romantic comedy or rom-coms is a subgenre of comedy. It's focused on humorous plotlines centered on romantic ideas, such as dating, marriage, break-ups, and true love. These movies usually contain happy endings.
For a movie to be considered a rom-com, you have to answer yes to all three questions:
When your watching rom-coms, it triggers a release of oxytocin, it is a stress free genre compared to other genres and it is a healthy mix of realism, and Hollywood magic.