Su Ji & U Ri

also starring Ham Eun Jung as the main female lead.

there are very similar vibes.
first: strong main couple
second: starring a crazy (delusional) sister
third: we have a loving family (mls family)
fourth: we have a crazy mother (sml's mother)
fivth: we have an older couple
sixth: we have three young couples
seventh: we have a young couple that brings two familys together that hate each other

switch the trope of "parents losing their chrildren" with "familys that are hardcore enemys and a neutral family in between"
this will give you a similar drama.

The ML is in both of these dramas. In both dramas, he plays a caring, lovely man who likes to take care of the FL.

similar ideas with hate to love and adaoption/lost children. both cute to watch...........................................