Both female leads are doctor and male leads are firefighter. Both don't get along in first but then voila!

The whole story structure are much similar. Both struggling main lead, heroine is trying to live in the right way and the hero is doing the brute work and getting used by others. Meet , help and fall in love. There's no mention of age gap though.

Similar plot line, where one pair of two couples have affair and the other pair also gets entangled.

Both have main characters with autism spectrum disorder and most of the story also revolves around this topic.