In July 2013, Do Kyungsoo was featured in f(x)'s new album "Pink Tape" in the song "Goodbye Summer".
In 2014, he sang his own song "Tell Me What Is Love" at EXO's first concert tour "EXOPLANET: THE LOST PLANET."
Do Kyungsoo made his acting debut in the movie Cart, playing a high school student, Choi Tae-young, whose mother (played by Yum Jung-ah ) works at a large grocery store, and after being wrongfully dismissed from her job, she decides to fight for her rights and take a stand against the oppressive management. The movie premiered at the 2014 Toronto International Film Festival in September. He also sang the OST "Crying Out" (외침) for the movie.
Later on during the year, he then appeared in the SBS's drama It's Okay, That's Love, which starred Gong Hyo-jin and Jo In-sung in the lead roles. [3] He played the role of Han Kang-woo, a character that the male lead (played by Jo In-Sung) has allegedly hallucinated. This character allowed Kyungsoo to receive high praises among the viewers of the drama, citing that this character, which is hard to portray due to its complexity, has managed to pull off by a rookie idol-actor.
Do Kyungsoo was ranked number one by critics among 40 idol-actors who participated in dramas in 2014. On June 22, in KBS's new Monday-Tuesday drama Hello Monster, he played a coldblooded psychopath. His acting left a strong impression on the viewers, drawing high praise from netizens. [4] [5]