Kang Young-suk was initially disappointed when he couldn't find a suitable job, so he decided to explore audition opportunities. In 2011, he successfully landed a role in musical
Hwarang after auditioning. After being discharged from the military in 2014, Kang ventured into theater with his first play, titled
B Adult Year. In the following year, he was recommended for auditions by friends for acting projects. While some may view his quick success in landing roles in the play
Model Students (2015), the musical ''Bachelor's Vegetable Store
(2015), and the musical Thrill Me'' (2015) one after another as luck, Kang attributes it to his diligent preparation and hard work in every audition. Kang's next role was Professor V, a genius physics professor who turns into a vampire in the musical ''Mama Don't Cry''. This was followed by another musical,
Black Mary Poppins. Set in Germany in the 1920s, it is a musical thriller that reveals the truth about four siblings involved in a fire and a mysterious murder that occurred in the mansion of renowned psychologist Dr. Gratzen, and the story of their missing nanny. Kang and
Jeon Sung-woo played the role of Hermann, the second child, a painter with a masculine and free personality, but lonely and easily shaken. The musical was performed at Daehakro T.O.M Theater 1 starting on October 13, 2016. In 2017, Kang was cast in the musical
History of Fools in a triple casting as the main character, Seo Min-ki, alongside
Park Si-hwan and Park Jeong-won. The play
Save the Earth, based on director Jang Jun-hwan's film of the same name, falls into the science fiction genre involving aliens. It is a psychological game between two characters: Byeong-gu, who has a deep wound in his heart, and Kang Man-sik, the person who inflicted the wound and holds the key to solving the problem. Kang, Park Young-soo, Jeong Wook-jin, and Key in the main role of Byeong-gu, took turns performing at Chungmu Arts Center's Black Theater from August 10 to October 22, 2017. == Filmography ==