 While composing the song, she was allowed to draw inspiration from storyboards and early footage.The theme and lyrics of "Follow the Nightingale" tie in with the characters' status as people reincarnated in the game's present, focusing on the main protagonist Luca asking why they were reborn.As with some of her earlier songs, she wrote some parts of it in code, with Kokia herself describing them as "perplexing riddle words".