BL : Male Pregnancy

Omegaverse
Beefy Alpha x Beefy Omega
Unplanned Pregnancy
Marriage

Gyuha and Chayoung has always been partners constantly having threesome with an omega male but then one day they ended up doing it together and thus they became each other's partner. Chayoung doesn't know Gyuha is an omega though.

Office Worker x Housewife
MPREG! Has kids!
Very Fluffy story with minimal to none angst
Realistic Problems (with ABO themes)
Personal Favorite!
I've re-read this so many times

Tall Buff Alpha CEO x Average Skinny Omega Secretary
OMEGAVERSE
Red Flag Seme but Character Development (at Side stories)
Has a kid!
Steamy sex!

Secret Child — Secret Identity
Mpreg — Omegaverse

All Isaac the beta wants is to live a normal life as a slightly unskilled florist and leave his turbulent past behind. That dream quickly goes out the window, however, when the infamous arms dealer Felix waltzes into his shop and takes a liking to him. It just so happens that Isaac's family needs protection from a mysterious enemy, and luckily, Felix is more than willing to provide it in return for Isaac's body.

Regression Beta to Omega Foursome

Eleanor has married Duke Fenrir eventhough he is a beta. Fenrir's family want a heir thus they bed him with an Omega, ultimately destroying El and Fenrir's matriage. Stricken with grief, El ended his life only to wake up to the day of his wedding and presented as an omega. Determined to have a happy life, El stopped their wedding and sought for an alpha through Gray with his knight, Sion, in the black market thud the start of their love story

《 》 Tall Buff Gangster Alpha × Average Skinny Debtor Omega — POSSIBLE MPREG

《 》 Euihyun (Uke) was left by his father with a lot of debt to Taeju (Seme)'s family. Tried to commit suicide with his little brother, Taeju offered Euihyun a job to pay off his debts that turned into a personal boy toy(?)

Tall Buff Swimmer Alpha x Average Skinny Figure Skater Omega
OMEGAVERSE — MPREG
Yirim (Uke) is a professional gold medalist Figure Skater, an omega who have an odorless pheromone. Cheongho (Seme) is a professional Swimmer who is too sensitive with pheromones. They met and started a Friends with Benefit relationship to falling inlove and having a baby!

Omegaverse
Surrogacy
Mob Alpha x Escort Omega
Comedy
Lots of SMUT

Seonu agreed to do a surrgoacy in exchange for money to pay of his dad's debts. The father of the baby? A mob boss, Beom, who is surprisingly soft towards Seonu. Beom finding Seonu beautiful, fell in love with him the first time he saw him and then on, they created their own family not without mob drama of course.

Omegaverse
Chaebol Alpha x Commoner Omega
Omega hides their kid
Comedy(?) / Not very angsty and serious, just goofy.

Haesoo has always been dumped, rejected, or cheated on bt his alpha partners because he is a recessive omega. Getting drunk as ge tries to move on, he meets Dogeon, a chaebol and VP of one of the largest company. He ends up sleeping with Dogeon and ran away after, later on finding out he is pregnant. Years later, they meet again.

Non Omegaverse
DJ — Daiya no Ace
Miyuki Kazuya x Sawamura Eijun

Eijun found out he was pregnant and decided to leave Kazuya so Kazuya can pursue his dreams of becoming a pro baseball player. Years passed, when Kazuya was taking a vacation, he met a child that strangely looks like Eijun and another child that looks like him. Kazuya wants to rebuild his family.