Mistakenly Provoked Satan: Baby, Please Be Responsible

Forced to marry an old man, everyone is waiting to see her laugh. However, the legendary old man is as handsome as a god, but cruel and bloodthirsty! He had all the power in the world, but he doted on her. "My man has the most beautiful face in the world and the cruelest and coldest heart in the world. He doesn't know how to smile or say he loves me." "Then you are still willing to be with him?" "He wouldn't let me leave." "Why?" "Because he's going to kill everyone." "... But you just said he wouldn't say he loves you." "He loves me. On the life of everyone in the world." "..." (Double place of male and female protagonist)