Feelings of empathy

So as to not alert the opponent of his intentions, Min-Jun was careful to maintain a calm and polite appearance on the outside. 

"Yes, I am indeed her brother. I believe there has been a misunderstanding regarding this matter. Am I right to believe so?" He asked calmly, raising an eyebrow.

"Y-yes...I… I mean... No... I… I don't... Know..." 

While his mind was trying to assimilate the new information, Ji-Won stupidly stumbled on his words.

"I just find this all too… shocking." he added in an undertone.

'So he is not her boyfriend, but her brother? Then, that means I was mistaken… this entire time… I was wrong… to think that he was her… her boyfriend…' Ji-Won sluggishly accepted the idea in his head.

As if reading Ji-Won's mind, Min-Jun continued to speak bluntly. 

"You believed I was her boyfriend, didn't you, Director Kang?"