Manhwa historical

Plz help me find this manhwa. It was about a girl who has the ability to see ghosts ever since she was little. She met this very powerful ghost??? Or something and named him Yato. She then gifted her eyesight to him allowing him to “eat” it. Years later i think she ends up being involved with another guy she has to marry ? At first he was rude and cold to her, but eventually warms up to her. He isn’t end game though since Yato is end game. It ends with her willingly going to Yato side and they live secluded in a region that is hard for things to grow. Eventually a flower blooms because i think Yato wanted to grow and make her happy.