Ikimono-gakari's new song "Ikite, Sansan" is chosen as the opening theme for the TV anime "Kingdom"! Lyrics and music are by Yoshiki Mizuno, and arrangement is by Masanori Shimada. The track includes a chorus recorded with massive audiences at each venue of the 2025 nationwide arena tour (subject to change). Common to both the Complete Limited Edition and Regular Edition: the jacket illustration is newly drawn by Yasuhisa Hara, the original creator of the manga "Kingdom"! The Limited Edition Blu-ray contains the "Ikite, Sansan" music video and behind-the-scenes footage. Packaged in a special specification with a richly filled special booklet, making it a must-have for fans. Also comes with Ikimono Card 067, a B2 poster, and a silver tape.