I keep seeing this title around! I actually read part of it a while back before I made my NU account and I dropped it because I was too lazy to manually check for updates But now that I have the reading list I'll probably read it soon!
It fits the fluffy requirement, the novel doesn't make you stressed... instead it heals you, I usually use the "childcare" tag if I want something adorable and fluffy~
You could search the fanfiction.net of your favorite fandoms for family/friendship/romance genre, personally I can't stand it but to each their own.