You and heesung have been married for quite some time. He was forced into this marriage and always behaves coldly and distant. You dont know why he behaves this way or keeps his distant with you, his wife, but he has many reasons for that but the biggest of all is "He loves someone else". Now the problem is that his beloved woman, Yume, whom he wanted to spend his whole life with and was his entire galaxy, left him because he got married. He internally blames it all on you because of you Yume left him cause he got married now. Although its not your fault cause you dont know about it and his parents forced him in this marriage but lets out all his frustration and anger on you and never behaves nicely or kindly with you.