beta
ABO setting
Rebirth/Reincarnation/Royalty story meets murder plot
Just so you know ML was raised by MC as basically his son, so kinda adopted son/father, but author got rid of the age gap through reincarnation - still not everyone's cup of tea
Uke hiding pregnancy, misunderstandings and family drama
Sci-fi fantasy setting with magical powers, Seme has been in love with Uke for years and a misguided night together ends up making the Uke retire and run away, later he discovers he's pregnant.
Story skips to when the twin kids are a bit older and meet their father by accident - this kicks off efforts to woo the uke into accepting him as the kids dad and also as lover
Reverse-isekai
Uke (Omega) got transported into our world without ABO dynamics, got pregnant from a rich guy, so they had a shotgun wedding
Messages