To wash off the angst (some might contain some angst, but overwhelmingly fluffy):

Just Got Hitched - SaidaAddict

"Dahyun was not prepared to get hitched."

I love this story, very cute. Dahyun's always teased by school meal club. Slight angst.

Available on AO3 and AsianFanfic

Why me? - Hazewkii

"Minatozaki Sana, a flirty patient tries to make her way into Dr. Kim's heart"

I shouldn't spoil too much, the description gives you enough info :)

Available on AO3 and AsianFanfic

Surprises, that's All - erenskies

"Due to her apartment getting renovated, Kim Dahyun is temporarily living in Momo's apartment. Cue Minatozaki Sana waltzing in and sighting upon a half- Korean in her best friend's apartment."

Adorable and funny.

Available in AO3

The More The Merrier - CelesteFitzgerald

"Dahyun stepped inside and got a good look around Sana's apartment. “...Why is there mistletoe everywhere?” she asked."

Omg this is fluff hell

Available in AO3