Sunny of K-pop band Girls’ Generation will collaborate with indie-band Roof Top House on their debut single “Heart Throbbing.”

The announcement was made with a teaser music video released Friday.“I heard I am the first participant,” Sunny excitedly said in the video. “I will work hard to make good music. Please look forward to Sunny and Roof Top House singing ‘Heart Throbbing’ together.” “Heart Throbbing” will be released on April 21 with an official music video.()