Tokyo Omegaverse

Itsuki, who's deemed as unknown gender and is expected to be a beta, lost his parents when he was only 15 years old. Since then he tried his hardest and worked hard for his grandma and for himself. Somehow he managed to land a job as a servant under a well-known alpha family, but despite his enthusiasm in working there, he was met by a problem—one of his masters, the younger brother Kaisei, despises all genders and is somewhat hostile, while the older brother, Ujou, is very discriminating towards beta and omega alike. But this isn't the only obstacle Itsuki have to face when his real gender comes to light... (Source: MU)

Leading a life without any inconveniences, the prominent Amamiya household's heir, Amamiya Ujou, is jaded and dissatisfied. One day, his uncle's illegitimate son, Yohira, appears before him. Fearing the son might kindle a predicament in the future, Ujou decides to preemptively take care of it. Having been found wan and frail in the slums, Yohira is to be sent to an orphanage. However, fascinated by the boy's subtle allure, Ujou brings him back to his mansion. Tonight he's going to... Examine his body? Sensual and stirring, this is the turbulent love story of a master and his servant! (Source: Tokyo Mangasha, translated)

In this world, people are categorized into one of three secondary genders: alphas, betas, and omegas. Alphas (α) are seen as society's elites. They find success in any endeavor without the need for much effort. Betas (β) are seen as the "average" and most populous, without major alpha or omega traits. Omegas (Ω) are perceived as unfortunate souls, bound to their heats that produce strong pheromones, sometimes strong enough to attract even betas. Hayato Kujou works hard, uncharacteristic for an alpha. But no matter his feat, everybody around him attributes his success to his alpha genes, except for Kaname Yao, a classmate and teammate on his high school's track and field team. Yao views Kujou as a rival and serious athlete, regardless of their genders: Kujou an alpha and Yao the beta...? Wait a minute... Yao was surely not prepared to get all mixed up in this alpha-beta-omega-fated-mate-bond stuff. (Source: Fantasista Inc.)

In this world, people are separated into the following genders: alphas, betas, and omegas. Yukihiko Fuyukawa is the successful, strong, and strict manager of a leading sales company. He is good looking, kind, and rich; the perfect package. Everybody swoons in his presence. On the other hand, Natsume, Fuyukawa's subordinate, is weak, sad, and disorganized. He often makes mistakes and has to make up for them by staying late in the office. One such night, Fuyukawa was waiting for his last subordinate, Natsume, to finish his tasks. Suddenly, something utterly dire comes to light: his suppressants have run out! He is in danger! And just as he thought his luck couldn't get any worse, the man he wants least in the entire world, decides to... BOND with him! We repeat: he is in danger! (Source: Fantasista Inc.)