Class of Lies Season 1 Episode 1

Mu Hyuk is in charge of defending Kim Han Su, the suspect of the attempted murder. According to the circumstances, Han Su is the only one who has a motive and chance to kill Su Ah. However, Han Su insists that he is not the criminal. Mu Hyuk wants Han Su to give him evidence to believe his assertion, and Han Su says that Su Ah is his girlfriend.