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 -
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This is just a list of manhwa/manga which has main character/s who gained a second life in the modern world setup.
Main Characters: Reincarnated/Second Life
Settings: Modern Society
The list is in no particular order.
Feel free to suggest anything in the comment section.