Baryu teases Jiho for not knowing Sia's door password even though he is her boyfriend. He then proposes to hang out with Jiho and they end up in a bar. Jiho is continuously teased and harassed by Baryu who attempts to convince that Jiho is only but a short-term flirt of Sia. Jiho retorts and walks out after warning Baryu to stay out of their love life. However, Baryu's words keep haunting him.
Sia finds Jiho in front of her apartment and he suddenly tells her that he would like to meet with her sister. He wants to overcome his OCD as fast as possible. Then he proposes a sudden request to Sia: to change her password!