EXOs D.O ( Cart) & Kim So Hyun ( Who Are You: School 2015) portray a pure summer love story in Lee Eun Hees nostalgic directorial debut Unforgettable (a.k.a. Pure Love). Joined by Yeon Joon Seok ( Boy), David Lee ( Pluto) & Joo Da Young ( Mourning Grave), the two young actors take their first starring roles on the silver screen. The romantic drama also earned D.O the Most Popular Actor prize at the 52nd Baeksang Arts Awards.
During a radio broadcast, DJ Hyung Joon (Park Yong Woo) receives a letter written by his first love Soo Ok (Kim So Hyun) 23 years ago. While reading the letter, old memories come flooding back. In the summer of 1991, Beom Sil (D.O), the young Hyung Joon, & their friends Sook Ok (Kim So Hyun), Gae Deok (David Lee), Gil Ja (Joo Da Young) & San Dol (Yeon Joon Seok) lived in a rural village. Sook Ok was a born singer but couldnt walk due to a degenerative disease. Beom Sil held a torch for her, but her heart was set elsewhere.