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, Gook 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. (Source: Wikipedia)