Hydrangea Cage

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...

Asahi Onozuka, whose father is a doctor who is a human rights advocate for the omega, a rarity in the alpha community, grew up in an ordinary household, Although he is an alpha, when he looks at his life from an objective point of view, it has turned out to be somewhat disappointing. However, by chance, he meets the daughter of a powerful alpha family conglomerate, the Amamiya clan, and unexpectedly marries into her family. He and his wife are on good terms, and he thought he would live an uneventful life.... But then he encounters Totoki, a strange omega who turns out to be his "fated mate." Will their encounter upset the gears of destiny, or will it get him back on track? (Source: Fig, translated)