Honey, it's Jun-yup Koo ... whose ~ ~ belongs to the Cool Dragon Group? I said the most classic is the previous X-Men. Love letter Many variety shows or dance shows have such scenes. Dancers are dancing with glow sticks in the dark. The glow stick moves beautifully. It is said that Jun-yup Koo is red. After his concert, many people imitated him ... you haven't heard of this man. But if you are a Korean variety fan, you must have heard of Cool Dragon.