My boss's secret partner

Sua and Hyeonwoo meet on a hot Friday night in Gangnam. Attracted to each other, they share a night in his apartment. Ignoring the confusion, Sua goes to work, but finds Hyeonwoo to be her new boss as a secretary. Despite the twisted relationship, her heart starts beating, and they start spending more aimless time in his apartment. Has Sua become a partner of benefit?