Omegaverse is an alternate universe in which Mpreg is possible.,there are 3 main roles: ⍺, β & Ω
⍺ - dominant & able to impregnate Omegas. Male Alphas usually have a knot when aroused.
β - subordinate to Alphas & may or may not be able to impregnate Omegas
Ω - generally lowest on the hierarchy. Male Omegas are self-lubricating & can become pregnant
Each Omegaverse has its own variations depending on the writer .
Fluffy ABO -
if U LIKE THE LIST THE PRESS THE BLUE RECOMMENDATION BUTTON
I'm sorry I'm not very good at remembering to categorize my manga, but I hope the summaries are helpful :)
I was able to read everything on this list completely, but I'm also willing to tolerate some pretty bad manga so take every rec with a grain of salt.
For more check out Romance Manga 2: https://www.mangago.me/home/mangalist/1128586/
If you want R18 romance head to my list Spicy Romance Manga: https://www.mangago.me/home/mangalist/1055007/