My brother says that when you have a writer block, you should get a sheet of paper and write random sentences of a story, phrases of a book, passages of a music like seriously everything that comes to your mind :p
it helped me once when I needed to write something for school and I didn't discovered my passion for writing yet, so I was whining like a kid~
Hope you get of your writer block

if i got the writer's block, i usually watch drama or read another stories and think about real life, when i did that i usually got an inspiration and idea.. so i could only say that read and watch could definitely help you to make a storie, hehe:D

I usually think up something along the line of what is keeping my mind occupied. Since Daehyun is on your mind, what about just thinking of him and seeing where that takes you?

I've experienced a lot of Writer's Block too during my story writing and just like you, i can't even think of anything...so what i usually do, like what the others have already suggested is to read books, A LOT... but sometimes since procrastination just keeps on getting in the way, i procrastinate through watching a lot of dramas until i remember my story...once i remember it, i try to re-read some of the previous chapters and write down all the main points then from that, i take a piece of paper and try to connect the events that might stop the writer's block and proceed to the next chapters. Sometimes, a writer's block can result from not planning the chapters ahead of time (which i usually do but idk about u), so what i do is that after i finish a chapter, i create the next 2-3 chapters after that so i dont lose the sense of writing, thus, i get to think up of more exciting twists for the story...
I would suggest listening to music too if that calms you and might give you some ideas through lyrics...you can also look at your daily experiences and maybe you can add that too to make the story even more realistic :)

I hope you recover from your writer's block, every author has experienced it sometime in their story writing, but dont worry, you'll find a way to stop it ^^

OMG you have writers block too?! There must be a writers block virus going around! I usually just procrastinate until inspiration comes to me, which is why I have trouble updating on a regular basis because my writers block can last for a week or more.. My procrastination usually consists of listening to music that reminds me of my story, which is why I create playlists for each one, and I read a lot. After that I have a brainstorming session as I call it, and I just spit out ideas until I find one I like

When I have writer's block I read. Like, A LOT. I just read and read until I come up with an idea of my own. And I don't mean fanfics, I mean books on kindle or paperbacks (I prefer the smell of paperbacks, call me weird :P)
Also, I find inspiration from watching movies and TV shows. Like if I want to write a romance fic but I can't make up an idea, I'll watch loads of romance films or tv shows.
Also, concept videos of the group you wish to write about often help! e.g. BAP's "One Shot" inspired loads of people to write gang-related stories about BAP.