Kaya releases "Flare of Soul," the opening theme song for the TV anime "A Tale of the Secret Saint," airing from October 2026. With its fast-moving, dynamic beat, memorable guitar phrase, powerful and self-encouraging lyrics that seem to cross-fade into the music, and Kaya's powerful vocals, the song is designed to set the listener's "soul" ablaze. The B-side track is "A star," digitally released in February 2026. It is another energetic song featuring a call-and-response section that has already become a staple of her live performances.