BEAST's Yang Yoseop celebrated his birthday with fans and fellow Cube Entertainment artist 4minute on the 5th. Yoseop was overwhelmed with love and expressed his gratitude, "The best day.. it's really precious. A lot of people celebrated with me. I am so grateful." Yoseop added, "I will work very hard. BEAST's companions, B2UTY, I love you." BEAST is currently promoting their 2nd track "Mystery," and have been receiving an incredible amount of support and popularity.