Hyacinth
Bei Xiaomi has been in love with Jiang Xi since high school and after they graduate from college they sleep together. Bei denies being in love with him and runs off, thinking they'll never see each other again now. Bei finds out though that he's pregnant. Apparently he was an omega the whole time, but his development was delayed.
Heat and Run
I’m going to mix up names so much with this manhwa. Two alphas join forces when their little brothers (an alpha and omega) hook up.
Baby, Punk Kid
Interesting! Read left to right. Ha Rim is an omega who lost his job and ran out of suppressants. Faced with going through his heat on the streets he decides to try to mug someone but he chooses the wrong guy to mess with.
Omega wa Pink no Yume wo Miru
Salaryman section chief Utsumi (alpha) is in love with his subordinate omega Mochizuki, who doesn't seem interested at all. So, he buys and expensive drug called the Pink Potion that induced heat in an omega, making them fall for the alpha that combines the potion with a drop of their blood. He tries to sneakily get Mochizuki to drink it but Suzuki, who he thinks is a beta, ends up drinking it. Suzuki is actually an omega and they have sex in the locker room shower. I like the growth of the characters in this one. The alpha is kinda scummy at first with the potion but redeems himself
Ijiwaru na Tsukai no Netsu ni Oborete
Akito is a omega prostitute who gets captured and sold on the black market. He gets bought by an alpha who wants him to have his baby because he's form some famous family
Marry Me, Alpha
I’m looking forward to this one Seowoon, an alpha, is a loner college student who works as a host to get himself out of debt, but one day a popular college student, who is also an alpha and who seems to have a crush on him, finds out where he works and buys his company
As Sweet As This
Looks cute! Omeg needs money to but suppressants and wants to work at a cafe because he loves sweets but they are only hiring Betas so he lies about his secondary gender
Kanraku Alpha ~Enigma~ 4 verse
Cocky guy tries to con a salaryman at a party but ends up getting raped, even though he’s an alpha. Pretty nice art style, ruined by the old rape plot device
Omega Porn
Tatsuru has been hiding the fact that he’s an omega but when he loses his heat suppressant and an alpha finds it, his heat is triggered and he and the alpha have sex, but they also kinda become friends.
Love Shuttle