High School King of Savvy

Lee Min-suk (Seo In-guk) is a high school student and varsity ice hockey player. He and his older brother Hyung-suk look very much alike, despite their nine-year age gap. When he gets a mysterious phone call from Hyung-suk telling him to impersonate his brother at the latter's new job, Min-suk is forced to pretend to be a high-ranking executive at an IT conglomerate. Living a double life while unaware of the rules within the Korean workplace, Min-suk learns how to navigate his way in the world of adults with the help of Jung Soo-young (Lee Ha-na), a temp with an odd personality whom he eventually falls in love with. [About] High School King of Savvy is a 2014 South Korean television series starring Seo In-guk, Lee Ha-na, Lee Soo-hyuk and Lee Yeol-eum. It aired on tvN from June 16 to August 11, 2014 on Mondays and Tuesdays at 23:00 (KST) time slot for 17 episodes.[Source: Wikipedia]