Sui-jin and Oh Hui-ji were being mean to you in the hall as you stood there getting picked on by them. Cha Heon saw this happening and was about to come help you but Dae-Sung got there first... Dae-Sung put his arm around your shoulders and glared at the girls as if to say "back off". Cha Heon got jealous... But being the cold and emotionless person he is, he hid it and walked away