HyeMi is always know to be considerate and helpful to her friends and family. If they feel down, she is there to comfort them but when she needs to talk to someone, she turns to her middle school friend, Kang Daesung. Though he is part of the biggest group in Korea, Daesung makes time to meet with his close friend. 

They have been through ups and downs together and after Daesung's 2009 accident, their relationship became closer. HyeMi's feelings for Daesung grew but she never knew what to do if he know. As BigBang prepares for their comeback in 2011, something happens that might shake their relationship and put them further from each other. Can HyeMi be the angel for the Smiling Angel of BigBang?