4K (포케이) was a sub-unit of the boy group 24K under Choeun Entertainment. They first debuted as a four-member unit on June 12, 2012 but with the addition of two members, became 24K. They were expected to continue to serve as their vocal sub-unit.
Their name stands for 'For K-Pop.'
- Rocking Girl (2012)
- Fancafe (inactive)
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