Between half-brothers

"What is going on here?" 

Ji-Won's voice just now sounded several degrees colder than usual. 

After he spoke, the surrounding air was freezing as though an arctic wind had swept by. Su-Jin could almost feel her teeth chattering inside her mouth.

Then, Ji-Won's arm muscles suddenly tensed around her shoulders. 

There was a barely contained fury seething underneath Ji-Won's entire body. He appeared to be on the verge of exploding in anger.

Even though she couldn't see his face, Su-Jin was certain that Ji-Won's current expression must be quite a sight to behold. 

Thinking of the man's frightening look, she involuntarily repressed a shudder.

At the same time, though, Su-Jin couldn't help but be confused.

'What the heck is going on here, though?' She asked herself in disbelief, then continued to ponder silently.