Unmei no Ban? Naraba Sono Akai Ito to Yara Kirisutete Sashiage Mashou

There are four humanoid races in this world. Jeremiah, princes of the human kingdom, joins King Calvin of the beastmen kingdom in a political marriage. However, she is treated as a thorn in his side. Jeremiah was sent to live in the detached palace and was stood up on the night to consummate their marriage. This is all because of Ymir, the king's soulmate, and his obsession with her! "Then let's sever ties to your bad relationship with the whole country!" With her wisdom, courage, and hidden tactics, Jeremiah exposes the "evil" that has infested the country. A country-stealing fantasy with an enraged, pure-hearted queen who stealthy judges evil! Source: MangaPlaza