Chunhee hadn't been in a good mood for a long time.
Actually, the times he felt "relaxed" and "fine" could be easily counted by one hand. Ever since he had woken up from his fated role, he had been too anxious to move around, afraid that anything he did would cause him another accident or worst, his death. Mr. C's arrival didn't make it easier for Chunhee either. Rather than making him feel at peace, it made him even more wary and doubtful towards the people who surrounded him.
Anxiety always followed him and fear crawled up to his system to the point the only thing he could think about was his future death and ways on how he would escape from it.
While trying to escape from his tragic fate, he forgot to pause and realize where and who he was at the present. Naturally, the moment he realized what he had been doing so far, Chunhee felt like a bucket of cold water had been splashed on his face.