Aoku Yake (Demon Slayer Hashira Training ED)

Where the Hashira Training arc's opening charges forward, this ending pulls you backward into something older and more complicated. MY FIRST STORY has always operated in the emotional space between anguish and acceptance, and here they've found a collaborator in HYDE whose voice carries four decades of Japanese rock mythology. The track opens with a deceptive gentleness — clean guitar lines that feel like they're picking through rubble after something enormous has ended. HYDE's vocal tone is unmistakable: weathered without being broken, theatrical without tipping into melodrama, each phrase carrying the weight of someone who has watched many battles conclude and knows which ones leave permanent marks. MY FIRST STORY's frontman Hiro plays against and alongside that legend, their voices occupying different emotional registers that somehow harmonize into something like shared grief. The title "Aoku Yake" — burning blue — captures the visual the song generates: not the red-orange of active flame but the hotter, quieter, more consuming blue at a fire's core. Lyrically it circles themes of inheritance and sacrifice, what veterans leave behind for those still climbing. The production has a controlled expansiveness — strings appear and vanish, the rhythm section knows when to hold back. This belongs to the space after the credits roll and you're sitting with what you just watched, not ready to close the laptop, needing the feeling to last a little longer.