romance with leads constantly in each other's houses

I'm looking for dramas where the leads are constantly visiting each other's houses. Whether it be the male lead constantly being at the female lead's house or the female lead constantly being at the male lead's house. They don't have to be living together or sleeping over constantly, but just being in each other's presence.

Bonus points if there is a scene where the second lead drops by expecting for the ML/FL to open the door, but instead it is the FL/ML (if that makes sense).

Playfull kiss 

Full house - thai