Roommate Season 2 Episode 10

The episode starts off with Gook Joo preparing dinner for her roommates. After having their dinner, the members go upstairs to watch Roommate but were shortly interrupted by the doorbell. Apparently, Jong Ok's best friends, Yoon Hyun Sook and Byun Jung Soo have come to pay a visit. Later in the episode, Jackson, Ryohei and Se ho join a marathon which requires the contestants to climb sixty floors of stairs in less than twenty minutes. Sunny, Nana and Gook Joo go along with them to cheer them on at the beginning of the race and waited for them on the 60th floor. After that, the Roommate members go out for an outing. Several days later, Gook Joo and Kang Joon visit Jackson for the showcase of GOT7's first official album, in which Kang Joon played a prank on him. (Source: Wikipedia)