The long-awaited third single from Kiyono Yasuno includes the intro and outro themes of the completely new animation "ARIA The CREPUSCOLO", which is scheduled to be screened in theaters in the spring of 2021. The single will be released in two formats, the "ARIA" version with a cover artwork newly drawn by Yoko Ito, the character designer of "ARIA". The third song in the coupling is a newly recorded acoustic version of the previously released song "Ikiru". This version features newly shot photos of Kiyono Yasuno. The third coupling track is a newly recorded acoustic version of the previously released song "Natsuiro Hanabi".