Go Eun Sung is a South Korean musical actor and member of the crossover HPresso. He attended Dankook University but is currently on a leave of absence from the Theater and Film program. He debuted in 2011 as a musical actor in "Spring Awakening" and, after his debut, he has appeared in various musicals such as "Grease", "Wicked" and "Notre-Dame de Paris", among others. Even while he was serving his mandatory military enrollment, he was granted to permission to appear in the military musical "Shinheung Military Academy, Return". In 2016 he entered the singing competition "Phantom Singer" where he made it to the finals and was grouped with 3 other singer, creating HPresso, eventually earning 3rd place.
(Source: Korean = Namu Wiki || Translation = MyDramaList)