Color Rush Season 2

Entertaining big families that come close to heart.
The way both dramas deal with family-only dynamics is peaceful.
Full of comedy.
Heart-filling romances.
Double in-law couples.

First Season of Color Rush 2.
The cast is a bit different but you should watch it for context.
The main couple is different but we get to know the world setting.

Both series have protagonists with a specific form of supernatural disease where only a small number of people around the world suffer from this rare disease. Both series also contain the idea that only their soulmate can help them in this disease.