@NexusD
Does he even really like sungah?
He actually really like her, yes, just look everything he did for her, or his jealousy because of Junwoo.
Like Junwoo, he was hiding behind a fake persona, probably to avoid problems like what happened to him in the past.
He started to change too recently, and it's good, because his Mr.perfect image was probably the reason Sungah couldn't see herself with him.
His arc will probably come soon, i really think we're far into the story, and not much is left now.