No one else can " Heechul added , and then mentally hit himself for actually making things worse . Hankyung 's lips lifted into a small smile which failed to reach his eyes . Heechul had never seen this side of him before .

Question: Why did Heechul feel surprise ?
Answer: Because Hankyung was behaving in a strange way .Because Hankyung had mentally hit him .Because Hankyung was eyeing him .Because Hankyung was upset .