Kouguu no Omega后宮のオメガ; Hoàng Hậu Omega; Омега королевского дворца; Palace of the Omega

[It's as if I'm a slave...]"As the lowest ranking member of the royal family and as an omega, my life has been decided from the moment I was born..."Iliya is an omega with the lowest rank in the royal family. He's been set for a political marriage and now has to leave for a faraway country to marry its king!?