Lantern by Day: The Mortal Realm Arc

She has lived for four hundred years, witnessing life and death across the human world, yet she cannot see color. He became a general at a young age and bears a blood feud, yet he dares not give his heart to anyone. When the Ghost King and the general share their senses, she tastes sweetness for the first time, and he sees his first ray of light. The price is that his life is slowly being drained away by her.