This kind of romance to be cute, funny, wholesome, and stress-free since they're a bunch of idiots who naturally does stupid things but they found each other and accepted their faults. 

At least, on these dramas, they already skipped the toxic parts in which couples had doubts with each other, not telling secrets, or very obsessed with their partners. These dramas don't have them because they are stupid, they don't think. They don't have time for that!

Examples 

Backstreet Rookie, Let's Fight Ghost, Birth of Beauty, Bubblegum, Don't Lie Rahee, Fantastic