SPOILER
kanghee is actually mls half brother, mls mother had a child with a yokai, which was kanhee, and also the reason why ml hates yokai. Kanghee I tried looking for his brother but when he saw how ml hated them he just stayed by mls side, he just wanted affection, which the ml never did gave him, so when he saw how easily he was moved by eunho, he felt jealousy. Later a lot happened, kanghee used the fact that he knew mc was a yokai to blackmail him into leaving, but ml brought him back and he was almost killed to reveal the secret he had but he never revealed mcs secrets to ml, mc begged for kanghees life so ml told kanghee to leave and never return.but later kanghee kidnapped mc to show all the things ml has done and told him to leave for far away. Mc did leave while kanghee confronted ml and revealed everything but ml did not budge except for the fact when he revealed mc is a yokai too, later he was killed by ml while mc was on the run also the guy yuhwan who loved kanghee was also killed while stopping ml from following mc who was kidnapped, he betrayed his master just for love

Y'all I don't really wanna hate kanghee, please tell me he won't do anything bad to the mc TvT