Everytime I watch Ki Joon's scene flirting or get mad with Ah Jung, I can sense only lust there, not love. Like the above scene. His words when he ripped the contract on episode 11: "Listen to what I am saying. If I like, I'm going to hold hands and go watch movies. If we ended up like more than that, I'm going to kiss you and if we like each other more, then …." After that he stopped, like he lost on his thought.