The Night Beyond the Tricornered Window, Volume 4 (The Night Beyond the Tricornered Window #19-24)

After Hiyakawa reveals that he makes his living by cursing people and then having them pay to lift the curses, Mikado is faced with a moral dilemma. Instead of leaving Hiyakawa, he decides to stay with him in hopes of making him understand the consequences of his actions - and out of fear of losing the one person who fully understands him.