It was composed in 1995. Using the style of concerto, it has been written as a modern harmony with original sense of rhyme. "Muse" indicates the inspirational goddesses of poetry, art and music in ancient Greek culture, it would be a perfect word to describe the uniqueness fo this music, so it has been titled "Muse Concerto". Hiro didn't satisfy with the original version of orchestration, he totally rewrote it and turned it into a new music in 2005.