Sayonara Wild Hearts is a musical rhythm action game played from a third-person perspective. When a young girl's heart breaks, the balance of the universe collapses. A diamond butterfly appears in her dreams and guides her along the heavenly highway, where she finds her other self: a masked biker nicknamed "The Fool". Traveling through futuristic cities, dark forests and electric deserts, she tries to find the harmony of the Universe hidden in the hearts of Little Death.