Kouguu no Omega: Yukihana no Shou

The omega prince of a poor nation who was sold off to a wealthy alpha king for political and financial gain must now confront the man who sold him—his father.

Ilia, the 13th prince of a small kingdom, was born an unexpected—and very much unwanted—omega whose birth brought shame upon his royal family. As the lowest-ranking member and an omega, he was forced by his own father into a political marriage meant to improve his kingdom's standing.

Years have passed since omega Prince Ilia was married off to alpha King Khalid of Hanu as a political bargaining chip. But thanks to the years of hardship and chaos they overcame together, this once political union has turned into a genuine, loving marriage. Unfortunately, their peace is soon sundered when Ilia gets word that King Cyril of Romelidahl—the omega-hating father who sold him off—has fallen ill. Having searched his soul for what to do, Ilia hesitantly decides to go pay his respects to the father who betrayed him.

(Source: VIZ Media)