please help me remember a omegaverse manga title

the plot, theres mc who is from a traditionally affluent family, who is a alpha with black hair, and his mom i think also alpha, has given birth to mc's brother who's a white haired omega, who is kept locked up and sexually abused by the father, till the father passed away. I think the omega might be a half brother, the mother says something like omega's are dirty.

Mc who grows up that also hates omegas. Theres a butler who he is raised with. After the dad dies mom also leaves, leaving, mc as head of household, the butler who mc has one-sided affection for, and omega brother. They all live a daily, life but mc (he's a little bratty bitch that should die) keeps hitting, omega bro, cuz of jealousy each time butler is nice to him. The butler pities the omega bro. Who was treated worse than a animal, and cant even speak properly.