Chimsireseoneun Geomeul Geoduseyo

Assassin Yurian marries the enemy duke Larkan and is ordered to kill him. However, Larkan is an immortal being who turns into a horny beast every night! When Yurian fails to assassinate him, Larkan makes a counteroffer. He will help her find her missing brother, so tame him.

“If you want to kill me… tame me first.”

A suffocating nighttime bond. Larkan and Yurian start a relationship to kill, but as time goes by, they are instinctively drawn to each other...

(Source: Naver, translated)