In order to get to know each other better, the members draw maps of their brains and talk about their profession, characteristics and personal interests. Nana, Guk-joo and Se-ho leave home to Se-ho's parents' house to get food and on the way, they learnt that it was actually Nana's birthday while Dong-wook, Jong-ok, Joon-hyung, Ryohei and Min-woo take a historic tour around Seongbuk-gu with the "Roommate" team. Later, Jong-ok and Sunny set out to learn pilates. At night, the members gather to plan a surprise party for Nana before she arrives home.
