My Dog-like Grand Duke

Can you charm a man you’ve only just encountered and wed him in under a week? On the night before her sister’s wedding, Riette, the princess of Sharlone, crosses paths with the imperial prince who has arrived as a congratulatory messenger. However, rather than presenting a gift, the prince brings a threat. "Marry my cousin, Kain, and uncover his vulnerabilities." "If a princess on the brink of marriage were to perish… wouldn’t that be a calamity?" To safeguard her sister, Riette embarks on a mission to entice Kain—the Iron Grand Duke, recognized as an ice pick and a fabricated being—but she encounters resistance from the very beginning. "Please do not come near me." Kain coldly dismisses each of Riette’s attempts. Ultimately, she even suggests a contract marriage, resolute in her desire to become his spouse. "You appear to have had a rather tiring night, so I will be gentle today." The impenetrable, fortress-like Kain is nowhere to be seen— and instead, he starts to cling to Riette… like a dog?