Jang You Sung is a South Korean singer, dancer, actor, and former member of RION FIVE (리온파이브), T.E.N, and WOW (와우; also stylized as W.O.W). He graduated from Hanyang University with a bachelor's degree in Theater and Film.

He made his debut in March 2014 as RION FIVE's rapper with their first self-titled digital single. They were originally managed by Narda Entertainment (나르다엔터테인먼트) and had some initial success. However, by 2017, the agency shifted the group's priorities and sent the members to several survival audition programs.

In January 2018, Narda opened a Makestar project to fund the project group T.E.N. The group was a collaboration between all RION FIVE members and five trainees. He re-debuted in May of that year as the group's rapper with the single album, "Do It, Do It". But by the end of the year, they silently disbanded due to inactivity.

At the same time, RION FIVE was experiencing a flurry of lineup changes, and Narda decided to have him re-debut as part of their new boy group, VICTORY. After several delays, the group never debuted.

In a rare situation, he was allowed to join A.CONIC (에이코닉) without being released from his contract with Narda. A.CONIC was planning a new boy group that consisted of members from different backgrounds. It included one former idol trying to return to the industry, two models, two actors, and two trainees who appeared in a few survival shows.

He re-debuted in March 2021 as WOW's vocalist with their first single, "Miss U". While he was actively promoting with WOW, Narda Entertainment was bought by Souls Entertainment in October of that year. The new agency decided that RION FIVE should have a comeback. Unfortunately, the plans fell through, and they silently disbanded a few months later. And, in a similar fashion, WOW was not able to promote steadily and went into a hiatus in early 2022. It is presumed they have also disbanded due to inactivity, but no official statement regarding their situation has ever been released.

He then made his debut as an actor with the lead role in the 2022 web drama BL "The Director Who Buys Me Dinner". He enlisted for his mandatory military service in late 2023 and was discharged in mid-2025. He is now represented by Peak Factory (피크팩토리).

(Source: MyDramaList) Edit Biography