In an emotionally charged exchange, Hee-do and Yi-jin confront the state of their relationship. Hee-do accidentally leaves her diary on a bus.
Quest roles:
Kang Hoon(Baek Yi-hyun (adult)), Jung Chung-gu(Myeongjin Book Rentals owner), Park Ki-duk(Lee Gi-hun), Kwon Dan-a(National team fencer), Park Se-in(Han Min-jung), Kang Moon-kyung(UBS director 2009), Park Bin(UBS Network staff), Kim Nam-hee(Cellphone store employee), Park Bo-bae(UBS Network staff)