Pitcher teams up with Cube
![테스트](https://koreajoongangdaily.joins.com/jmnet/koreajoongangdaily/_data/photo/2013/12/17201703.jpg)
Ryu Hyun-jin
Ryu is singing with the duo Troublemaker - HyunA from the group 4Minute and Hyun-seung from Beast - on the song “Smile Again,” which is due out on Friday. They recorded a second song that will also be released. Proceeds will be used to help blind children, through HJ99 Foundation, Ryu’s charity.
By Lee Sun-min
with the Korea JoongAng Daily
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