Jaeun (재운) is a South Korean singer. He is a member of the boy group ARGON and was previously a member of INX under the name Win (윈).
Jaeun originally debuted in the boy group INX under the stage name Win. The group was only active for one year and released two digital singles before disbanding in 2017.
Sometime after this, Jaeun joined a new company. He was revealed as the fifth member of the upcoming six-member boy group called ARGON on November 22, 2018.
Source: kpop wiki