Marriage of a doting alpha and stray omega
Alpha assaults an omega, offers to marry him but not mate after.
Unmei Ijou, Koibito Miman. - Douki no α to Jouai Keiyaku
Airi Yamashita(beta→omega) is a driven career woman who just lost out on a promotion to the handsome Ren Kugayama who entered the company at the same time as her. But when they go out for an office drinking party, Airi totally loses control of herself and sleeps with Ren. The next morning, he tells her it's because of her omega pheromones, and sure enough, the doctor confirms that her gender has changed. Ren then offers to help her deal with her heats, but what he doesn't tell Airi is that she's his fated pair and he's noticed her pheromones for a long time. Trigger warnings: drunk sex, drug(roofie), attempted rape.
Pendulum: Kemonobito Omegaverse
When Kai was still just a child, his father dumped him on the footsteps of the beastman Ruado just because he was an omega. Ruado took him in without really understanding why he did it, and since he's raised Kai lovingly, trying to let Kai pursue everything he wants without being held back by his omega gender. But now that Kai is an adult, he should have reached his first heat, but it still hasn't happened. What Kai doesn't realize is that Ruado hasn't told him everything about his omega gender and what that will mean for the two of them. Trigger warning: child grooming.
To Make A Delicious Omega Squeak
In an omegaverse/beastman world, Sachio Kurumizawa is an omega mouse, possibly the worst combination as he's prey to pretty much anyone. He works as a manga author to support himself while leaving the house as little as possible, but to make matters worse, his editor Ukano Shinobu is an alpha fox, the natural enemy of a mouse like him! When Sachio goes into heat due to a drug, Ukano offers to help him get over it faster by having sex, so the two begin a physical relationship, but Sachio finds it hard to trust anything the seemingly carefree fox says, especially when Ukano might just be trying to eat him, after all. Second volume follows their relationship after they start dating. Trigger warnings: drug(heat inducer), attempted rape, cannibalistic themes.
The Omega Takes a Husband
Yoshiharu is the number two in a yakuza gang and he should inherit it from his grandmother. The only problem is, Yoshiharu is an omega, and the yakuza world is still very alpha supremacist. Worried about her grandson facing all this alone, his grandmother forces Yoshiharu to attend wedding interviews that all go terribly, until one guy drugs him. Yoshiharu is out of it, but he swears he smells the pheromones of his fated pair, but the only person there, his faithful retainer Makoto, says there was no one. Then, only days later, Yoshiharu smells it again and realizes Makoto isn't the beta he thought he was, and is actually his fated pair. But while Yoshiharu is ready to go all in on Makoto despite his general hatred of alphas, Makoto struggles to believe in Yoshiharu's feelings or that he could ever be good enough. I liked that Yoshiharu's character was strong and not a pushover, even though he was an omega, though he was rescued once. ️Trigger warnings: drug (heat), attempted rape.
Takane no Hana wa Chirasaretai
Hana is an omega who doesn't go into heat and lives a normal life working as a barista at Starnyaks while obsessing over his favorite customer, the famous flower arranger Renjaku. But when Hana unexpectedly goes into heat, Renjaku ends up sleeping with him, despite saying Hana "stinks," and he would never pair with an omega. But this one night is the start of a connection, and Hana is getting to see Renjaku more and more, until his younger brother suddenly arrives and announces that Hana belongs to him, forcing both Hana and Renjaku to face their past traumas. Renjaku is a bit of an asshole and the brother is creepy and gross, but I actually like this one a lot. I think Hana is very cute and the main couple's relationship has really interesting growth. ️Trigger warnings: incest themes, voyuerism (involving a minor).
Omega ni Dake wa Naritakunai!! ~Isekai Tensei Shitara Ane no BL Manga no Nakadeshita~
Taisei is helping his sister with her BL omegaverse manga when he dies and gets reincarnated into her story as a character based on him. Because she said she'd decide his second gender based on his partner, Taisei ends up with his second gender undecided, for now. But as the second male lead of the original story, an alpha named Jasper, keeps getting close to him, Taisei starts moving closer and closer to becoming an omega, a fate he'd rather avoid. The main couple is interesting to me, but the story has honestly gone on longer than it feels like it needs to. Trigger warnings: dubcon(heat), discrimination.
I’m an omega and it’s all my fault
Top student alpha is actually omega
Oredakeno Senzoku Alpha
Mei Todoroki is an alpha who joined a company with an ethos of treating all genders equally, and he was assigned as the assistant to famous omega model Masatsugu Otonashi. The only problem is that Otonashi hates alphas and won't even acknowledge Todoroki. Todoroki does his best to prove himself to Otonashi, but as the two of them get closer, he starts to worry his alpha nature may cause a problem, after all. I like Otonashi's character a lot, but his backstory is pretty rough. ️Trigger warnings: stalker, mention of statutory rape, mention of gangrape.
Ore no Tsugai ha Thoroughbread Omega