Omegaverse Yaoi

Arrogant and cool class president Chika always thought he was an alpha until he went into heat for a seven-year-old boy. Not for everyone, but I think it's an interesting look at the problems that could arise in an omegaverse world.
Trigger warning: kissing a minor, shotacon.

Doujinshi. Levi(omega) meets his neighbor Eren(alpha) and immediately knows he's his fated pair, even though Eren is still in elementary school and Levi's an adult. Same author as above, feels like a first pass at the same story.
Trigger warnings: shotacon, attempted rape.

Doujinshi. Eren(omega) has always known that the lead singer of his favorite band was his mate, but he assumed they would never meet until he got the legendary "fan service" ticket that would allow him to meet L-san in person.

Akihiro (omega) and Reiya (alpha) are high schoolers whose parents arranged a marriage between them, but it's fine because they fell in love and now they're freaking adorable.
No trigger warnings.

Sena and Kamishiro are rivals in an all-alpha school until one day Sena sees Kamishiro sleeping with the school nurse and goes into heat, prompting Kamishiro to force a relationship between them.

Sakima (omega) and Renji (alpha) are childhood friends in high school who couldn't be less interested, calling each other "pervert" and "old man". But when Renji sees Sakima smelling his jacket in heat while jacking off, there's no going back.
Trigger warning: threat of rape, dubcon, aphrodisiac.

When Asahi(omega)’s childhood friend(alpha) finds out he’s an omega, he rapes Asahi then distances himself. So what’s going to happen when they meet again at a high school reunion? A very unhealthy relationship.
Trigger warning: rape

Tsugumi(omega) is a pipe-wielding delinquent who hates alphas and deals with his heats through "willpower." Megumi(alpha) goes to another school and first met Tsugumi while trying to avenge his friends. But when the two get trapped in a shed together while Tsugumi's in heat, Megumi's willpower may not be enough.
Trigger warnings: rape, attempted rape, discrimination.

Takuma(omega) and Hachi(alpha) are rival delinquents, but one day during a fight Takuma goes into heat and Hachi bites him! It turns out Hachi is the heir to a yakuza family who warns Takuma off, but Takuma wants Hachi to take responsibility!

Akane(alpha) and Aoi(omega) are happily married, and now their daughter wants to know how they met back when they were always fighting as delinquents.