I Shall Conquer the Unruly Beasts

When Sione was married off to the Emperor of Belfator, 16 years her senior, she didn't think things could get any worse. But then, the unthinkable... His Majesty was murdered! Could one of his loyal beasts have done this? Can she tame the three cursed men before her? However, before long, they each make a proposal: Marry me. Now left to protect a young stepdaughter, Sione must choose. Will she marry the Dog, the Snake, or the Eagle?

(Source: Pocket Comics)

Note: First released in English, with the initial eligible release in Japanese followed by Korean, making it a manga by our standards.