Recommendations

-both are about relationships of multiple coples, but 7 Something separated them in different segments.
-both have their characters learning something new from their couples.
-both are light-hearted romance

Both female leads were adult in the thirtieth but mentally as a teenager.
Somewhat comedy, fun and easy watch.
Quite romantic.
Cute couples

-Both stories focus on relationships of multiple couples.
-Both have light and fluffy romance with hints of comedy.

The character travel back and forth from young to old and old to young.
Somewhat comedy
Fun watch. Not too serious. Good acting.

Both female leads has terminal illness
The male lead knowing that and stick with her till the end.
Very romantic, love story

Both female leads has terminal illness
Very very romantic movie
Heart warming,
Male lead remain on her side till the end

Both female leads have terminal illness
Both movies has talented musical actor or actress
Heart-warming sweet movies
Very romantic

Both female leads has terminal illness
Very romantic
Roller coaster ride relationship
Very beautiful main couple

Both female leads has terminal illness
Beautiful couple, strong bonding
Heart-warming, royal, challenging life
Die-heart romantic

Both female leads has terminal illness.
Both are Chinese movies
Both movies has some silliness, heart-warming moment.

Very beautiful couple
Both female leads has tragedy
Both male leads complete their love
Very beautiful story.

Both female lead has terminal illness.
Die heart love story.
Very romantic.
Great chemistry, beautiful movie

Jirisan happens in nature and in Missing it's similar.
These two also have the fantasy/mystery element that really takes a strong part of the story.
There are moments of teamwork for both shows though for different purposes.
In Jirisan, they are looking for people who go missing on the mountain while Missing is sort of a different perspective of searching for those who go missing.

professional single drama is also so cute and love and comedy drama which also feels like watching put your head on my shoulder

A half-reality, half-scripted tv show with strangers meeting and starting a relationship
The hosts in the panels both have a similar vibe, commenting on the couples