hi hi! oh this is a good question <3 and it's honestly made me think and reflect a lot on my creative process and how it's changed over the years. because at first when I started writing fic back in 2021 I think I had a much more difficult time coming up with ideas. I'm not sure what has changed other than the fact that I have now spent the past few years reading and writing and it seems to come to me much easier because of that. I started reading fanfic at the same time I started writing it so maybe those things are correlated!

For me, reading a lot is key to my creativity. Not in the sense that I seek to find my own ideas in others writing but more like I'm broadening my own horizons. I learn something every single time I read a new work, whether it be a fanfic, manga/manhwa, novel, etc. It's like I absorb new ways to be creative. I think it also helps that I am very open minded when it comes to the things I consume and read a wide rage of types of content. When I let myself have endless possibilities it allows my mind to wander without fear and I do genuinely believe that plays a role in my process. If I have too many restrictions I end up just putting my thoughts inside of a box that I can't think my way out of. But if I can let go and just approach every idea I have naturally, even if I end up not liking it or think it's not very good/doesn't fit with the concept I'm going for, it's no biggie. I can just keep searching for that idea that does fit.

Something else is just in general being familiar with tropes. So like, to walk you through my thought process on the one idea you brought up:

My widgets gave me "he's a cool dad" paired with a photo of minho looking all bad boy in a leather jacket (hottt). So first thing my brain has done here is cast Minho as the dad lol. Then I notice the photo of the outfit is very sexy/slutty and so I ponder that for a bit. What kind of person would wear this? Where would they be going? What would they be doing? There could be any number of answers to this question but when in doubt I draw from my own self-indulgent preferences. I like stories about sex work. So, I cast Jisung as a sex worker.

From here, what's left? The details of the relationship between the two of them. What's their history? How do they come together? What challenges do they face? Again, I answer these questions self-indulgently. I like incest stories lol. I also like age gaps. So they're father and son. But if I just simply made them father and son having sex at Jisung's job that wouldn't be much of a story would it? So I get curious about what would be interesting. What would I enjoy reading about if I weren't the one coming up with it? I draw from what I know based on what I've read and all the "ways of being creative" that I've stored away. It's fun when two characters have been apart for so long they don't even recognize each other but then find out they're actually someone significant. I love those kinds of plot twists. They really hit you in the gut. So I start connecting that in my head. Minho shows up at this sex club because he's looking to blow off steam and he picks this pretty young thing that's just his type. He doesn't realize it's his son because he hasn't seen him for all these years, and likewise for Jisung.

Often when I post ideas, there's a lot more context behind the scenes than I actually include lmfao, as I'm sure you can tell.

Another thing I've found is that it helps IMMENSELY to talk to people about ideas. It's something I've been practicing for years. Bouncing ideas off of friends, whether or not they're writers too. I always learn things from them, as well. Even if we're just doing it for fun and whatever we're talking about never gets written out, it's amazing practice.

Really I think coming up with concepts is like anything else in the sense that practicing really helps. Sometimes I think of ideas just for the fun of being creative. I might write them down just so I don't lose them if I really like them but I don't pressure myself to ever actually write them.

This is also just a very personal recommendation but if you're writing m/m fanfic i SO recommend reading BL jkanwdkjnwd I'm so serious...it helps me immensely especially if you're interested in writing explicit works. BL manga is great also for visualizing positions and coming up with sexy little things to add to your smut scenes. But it also is just a great way to learn about tropes and storytelling.

I hope some of this made sense and wasn't just incoherent rambling lmfao but you say that you're good at fleshing something out and making it nice when you have a solid prompt and to be honest I bet you already have the skills to come up with your own ideas, you just have to learn to utilize them in that way!! If you have the creativity to come up with all those details then I'm confident you can also come up with your own. <3 Sometimes a solid concept for a story can bloom from something as small as wanting to write a certain type of interaction. That's honestly how most of my fics start. I decide "oh I'd love to see omega minho riding alpha jisung" and then I just...figure out the story around that one thing. That's how my fic "heat instability" came about haha.

Follow your heart and your own desires!! Write what YOU want to read and it will come to you so much easier. Try not to worry about whether it makes much sense, is overdone, is what others want to see, etc. Just start writing. You can always change things later. I think that's one thing I really have had to learn (and still have to work on lol). You don't have to come up with the perfect idea on the first try. You can just start writing down an idea with whatever nonsense comes to mind and if halfway through you decide you wanna change something about it, you can totally do that. Writing is about that creative process of letting your thoughts flow free. That's what makes it so fun and so beautiful if you ask me.

anyways yeah I'll be quiet but thank you for your question I hope this helps or is at least somewhere to start haha and I hope one day I can read one of your ideas that you call your own <3