Cinderella at 2 AM

While Yun-seo and Sung-min seem to be getting closer, Ju-won becomes jealous and resorts to Si-won's advice of turning on his belligerent side. His sudden demeanor confuses Yun-seo and frustrates her, angering her. But when she sees Ju-won with another woman, she is shocked by how flustered it made her.

Ju-won shows up at Yun-seo's mother's funeral. He's there for her once again, and she cries in his solace. Then, he surprises her with a marriage proposal, leaving her speechless. As he waits anxiously for her answer, circumstances force him to go to Spain, but Yun-seo rushes to see him at the airport as if she will lose him forever.

Yun-seo realises that before she can be honest about her relationship with Ju-won, there's something she needs to address first. Aware that the result might not be favourable, she decides to handle the situation on her own without involving Ju-won. Meanwhile, Si-won and Mi-jin are enjoying a wonderful night out together, but what starts as a moment of sincere honesty unexpectedly turns awkward.

While Ju-won and Yun-seo enjoy the outdoors, the shocking news of Seon-ju's husband's affair in New York spreads. To remedy the shattered image of the company, Seon-ju allows Yun-seo to marry Ju-won. However, she will expose Yun-seo's impoverished background to show the humility of the conglomerate family. Ju-won learns about this and then charges to confront his mother angrily, but Yun-seo stops him.