The enemies in a love story can be many things. Maybe it's a jealous ex or cultural differences. Stars might be Tom Cruise and Scarlett Johansson. Or it could be personal insecurities. The actors could be Chris Hemsworth and Natalie Portman.
It could vary depending on the specific love story. Sometimes, it might be a rival lover or societal expectations. The stars could be well-known actors like Brad Pitt and Angelina Jolie.