Episode 1 - S1.E1

Min Gi, Sang Hyun and Yoon Chul are three friends who are training under the Korean Aerospace University to become pilots. Hye Ran is an interior designer who works for Airbus, and Ji Won is a flight manager at the Korean Airlines. As they go through the trials and tribulations of flight school, adult life and love life, each of them is faced with unique struggles which bind them further together and advance them further in their careers.

(Source : Jungjeon-mama at MyDramaList)