A lot of them are a mix of angst and fluff. This one should be overwhelmingly angst.

[TW] 24:00 - HeavenWard

"Because at the end of the day, through all those tears we shed, the poisonous lies we innately weave, I know your heart is mine. You belong to me. And I'll be dragged through the jagged pits of hell and back before I ever let you leave."

So realistic, it's scary. The ending is a plot twist. It's really beautiful and a one-of-a kind experience fic. Not a lot of fics are on topics like that.

Available on AsianFanfic

if i'm not the one (then i'm not the one) - forbiddenquill

"Sana has been in love with Kim Dahyun for most of her life. When she receives a confession in the form of a voicemail from Dahyun, she’s ecstatic. Until she hears the end part of the message: "I love you, Yoo Jeongyeon. I always have and I always will."

Angst and unrequited love. I have a soft spot for unrequited love. 10/10.

Available in AO3

Before Sunrise - uniform

"Dahyun is engaged. Sana isn't sure how to feel about this."

Angsty with internal homophobia. Feels bad for Sana the entire time.

Available on AO3

it's the little things - orphan_account

"Dahyun has been dreading about her long overdue confession for Minatozaki Sana. It doesn't help that Sana sneaks her way into her bed and into her heart most of the time."

Oh this one is so adorable. All the little things you will