[Delirium-Zer0]

masa, you can at least translate those ...hmm... i guess they're onomotopaeic terms even though they're more feelings than sounds. There's no real equivalent in english, save a few words like "eureka" (an expression of happiness when one finds something long sought-after) or "wow" (said when something leaves you awestruck and amazed). English speakers should keep in mind, these aren't words that actually MEAN this, they're just expressions of how someone feels when this is happening, or the sound people imagine it makes, perhaps.

"hirahira"= fluttering
"yurayura" = swaying side-to-side (or perhaps trembling? the context of the lyric suggests both)
"kirakira" = glittering, shimmering
"kurakura" = like the kind of happiness where you don't even know what's up and what's down anymore (that one's kinda hard to explain, lol)

Masa, correct me if any of these are wrong, this is just what i've picked up (but i needed a dictionary for kirakira )