IU released a jacket image of her new track, "Heart."

On May 17, an image of IU was released on Loen Tree's official Twitter. In the photo, IU is seen gazing into the camera while holing up her palm with the word 'Heart' written on it. She showed off her beautiful looks while wearing a solid white color knit sweater and nude makeup.

"Heart" is a track IU wrote for her fans. It was released at 0 AM KST of May 18, and it was featured at the end of KBS 2TV's show, "The Producers." It is not an official soundtrack of the show, but it was played in the show to show gratitude for her fans' love and support for IU.

IU composed, wrote, and arranged the track with composer Kim Jaehui. It's a simple track that features classic guitar and IU sings poetic lyrics that talk about remembering precious things in life.

IU is currently furthering her acting career by playing the role of a top singer named Cindy in "The Producers."