《夢花火百鬼羅馬》是一首充滿神秘與幻想色彩的歌曲，歌詞中融入了日本傳統文化中的妖怪元素，描繪了一個夢幻般的夜晚場景。以下是這首歌的羅馬音歌詞：
yume ni utsuru hanabi ga
sora ni hiraku yoru no keshiki
obake-tachi ga odoru
kagami no naka no sekai
kimi to watashi no aida ni
tachimachi umareru kizuna
fushigi na chikara ga
yami o terasu hikari ni
yume no naka de au
kimi to boku no monogatari
obake-tachi to asobu
yoru ga akete mo owaranai
hanabi ga chitte
sora ni kirameku hoshi no yō ni
kimi no egao ga
boku no mune ni nokoru
yume no naka de au
kimi to boku no monogatari
obake-tachi to asobu
yoru ga akete mo owaranai
yume no naka de au
kimi to boku no monogatari
obake-tachi to asobu
yoru ga akete mo owaranai
歌詞中充滿了夢幻與現實的交織，描繪了在夢境中與妖怪共舞的奇妙場景，表達了對美好回憶的留戀與對未來的憧憬。