Eun Oh (Lee Jun Ki) finally lashed out in jealousy.

On the Wednesday episode of MBC "Arang Magistrate," Eun Oh (Lee Jun Ki) and Ju Wal (Yun Woo Jin) fight over Arang (Shin Min Ah). 

Eun Oh had already confessed to Arang his feelings for her and when she rejected him, he stepped back in order to make sure that she was comfortable and told her that he would only help her go back to heaven.

After that, Arang sensed that Eun Oh was trying to avoid her and she confronts him about why he won't even make eye contact with her.

Eun Oh then says, "I just don't know what to do. I promised that I'd make sure that you were comfortable but it's not easy. I tried to hide it but you were looking at him and then I just couldn't take it," and confesses his jealousy.

He continues, "So that night I really regretted it. I should have kept on going even if you said no. I shouldn't have believed you when you told me you didn't feel the same way. I should have tried to convince you even if you were telling the truth."

Near the end of the episode, when Ju Wal asks Arang for a little bit of her time, Eun Oh stops them and says, "I won't let that happen so get out of here."