India, Jan. 28 -- Who said growing up was easy? Who even knows if we ever really grow up or become better at hiding that we are adults? Cooper Raiff, the immensely gifted young writer and director, might as well know a thing or two about this dilemma. He is back in familiar territory after S*ithouse and Cha Cha Real Smooth with his new show Hal & Harper. Premiering at the Sundance Film Festival, this is an amiable and moving coming-of-age drama that is also very, very sad. It is also Raiff's most ambitious work, emotionally mature and formally daring in equal parts. (Also read: Sundance Film Festival programmer Sudeep Sharma: 'We try to approach our selection process with curiosity and wonder')

Cooper stars as Hal, who we meet right off ...