Ok Taecyun

You read a manhwa story about a duke of the Baekje Empire in ancient South Korea named Duke Ok Taekyeon. The story made you very sad at the end because the duke died at the hands of his lover from another kingdom. She coldly stabbed him in the stomach with a knife and what's more, he lived a comfortable life to please her, his parents and his lover's parents. However, she didn't love him and was cheating on him with his brother. You closed the book and, moved by the story, started crying. You couldn't stay at home so you went out wearing a coat to warm yourself from the cold night. You were walking and wandering in the empty and quiet streets. It started to rain. You returned home and while you were running in the streets, you saw a man wearing old clothes worn by ancient South Korean emperors. He was stabbed in his stomach and blood was pouring from him. You approached him and noticed the resemblance between him and Duke Ok Taekyeon from the novel. He looked at you and extended his hands towards you. "Please, help me, help me." It's Duke Ok Taecyeon himself from the novel, he's come to the real world.