sana

https://www.mangago.me/read-manga/bait/

i hate omega verse with a strong passion but
The Secretive XX

Do read the tags
https://www.mangago.me/read-manga/willow_love_story/

https://www.mangago.me/read-manga/kimi_wa_mu_kamenai/

https://www.mangago.me/read-manga/double_fake/

https://www.mangago.me/read-manga/kimi_wa_jun_ai_ni_fusawashii/

the omega takes the husband
new world order (probably the most angsty and unique omegaverse story buildup– lots of angst and also tw's are there. pls do check)
dog's mask (not niche but i like the angst haha)
dawning light (mixture of omegaverse and also feels smth like guideverse even though it technically isn't)

Private Call
I second dawning light!!
Dash
Wild beast warning
Diamond dust (apparently? It only has 200 ratings, but it's so popular in my house that I didn't realise it)
Breakout scandal
Look at me (is a little "ordinary" kind of manhwa to read and feel good, but nothing crazy happens)

You can check out my full list for all the omegaverses and see a few more there if you want. It's 6 AM and im dead lol https://www.mangago.me/home/mangalist/3784248/?filter=&page=1