Rapper San E revealed a handwritten message from Wondergirls' member Yoobin. The two are under the same company, JYP.

On the 27th, San E posted a picture on Me Today along with the comments, "Yoobin even has pretty handwriting. I see you were really busy...I'm so sad I didn't get to say goodbye to Wondergirls. I hope you guys are a hit in America."

The picture shows a handwritten message by Yoobin in her album jacket cover. 

Yoobin wrote, "Please give me a song too. I really envied Hyerim's song 'Act cool'." 'Act Cool' is a song produced and featured by San E on Wondergirls' album.