Fire Flower / halyosy feat. Kagamine Len (lyrics and music by halyosy) is covered by Singing Cosplayer Hikari, whose cover of "Yume to Hazakura" is a worldwide hit. In the cover photo and music video, Hikari is wearing a yukata called "Bibide Ribbon" by "Furifu" to match the song's impressive summer and fireworks scenes.