Hyun-jae suddenly comes knocking at the door, sending Hae-joon and Yoon-jae into a frenzy to hide the evidence that Yoon-jae was there. Hae-joon pretends to be nonchalant as she lets him into the house. Meanwhile, Soo-jae gets a strange feeling when the gym that he took over isn't open. He calls his friend Chang-yeol, but he doesn't answer.
