I love hee-na seriously because she cares for na-kyum sm but u really have to let nakyum be. He's 24 and decided for himself that he wants to be with seungho and you can just look over him but dont interfere with so much. Hee-na rlly needs to listen to na-kyum and keep her arms open as soon as it doesnt work out between na-kyum and seungho anymore.