This ninja song is the last work of legendary lyricist Ikki Matsumoto, known for his many hit songs. The song is a "ninja × ninja" song, but at the same time, it is a "human × human" song that connects people to each other. New wave group "You'll Melt More!" and action actress Minami Tsukui teamed up for the first time to sing to the world about the appeal of ninja and the importance of human connections.