BUR #44698 has been approved by @evazion.
rename mani_mani_(vocaloid) -> manimani_(vocaloid)
The song title is commonly seen as a single word rather than separated, especially when it's translated from まにまに rather than マニマニ and when compared to other songs with the same spelling such as kami no manimani (vocaloid) (神のまにまに) and karappo no manimani (vocaloid) (からっぽのまにまに).