From her very first day at the robotics lab, Youjin constantly clashes with her peer, Sejin. Sidelined with no real responsibilities, she grows anxious that she is falling behind. Although Minjae is conscious of Youjin after what happened on the night of the welcome party, he intentionally keeps his distance. To Youjin, however, his behavior feels cold and indifferent. Her pent-up frustration eventually boils over. Meanwhile, Seohyun, an original lab member and Minjae's first love, leads the entire group to a place called "Dieland."