A traditional Korean style epic that depicts one person's life through four different phases, represented by the four seasons. The symbolism represented is the five-tailed fox, a spirit known as Kumiho (九尾狐), that lives a thousand years by going through changes in four phases, much like humans do. Although Kumiho is usually represented as a nine-tailed fox, there are derivatives like Yobi, who is seen with five tails instead of nine. The song was featured in the "Crazy Otaku's Unofficial B-Rated Don't Ask SeeU Concert", however only the first act was featured in the performance.