Overview:

While Mi-na is out, Hyeon-goo invites So-hee to his house and enjoys. She forces So-hee, who wants to go to sleep, back to her house because Mi-na doesn't know when she will come back. However, while secretly meeting Seung-mo, Mi-na informs Hyeon-goo that she cannot enter her house, and Hyeon-goo regrets sending So-hee to her house. But this time, he invites Soo-yeong, a business traveler, to his house.