I had a hard time deciding, but I finally went with Hatsukoi Cider over Aa, Yo ga Akeru and DEEP MIND for the simple reason that she sings the whole song for once.
I know it costs mo' money, but I think that all Buono! singles should be released from now on with each member singing the entire tune in her solo version.
@ BerryZ LoLiPoP > thanks for the info about the original song.
The original "CAT'S EYE" is by ANRI. It was the first opening theme to the CAT'S EYE anime.
I like the girls' cover of it. It's a nice modern version :) The adding in of the rap was a nice touch, IMO. Though I feel it's auto tuned to death. It sounded nice in some parts but I think if they just kept there voices normal it'd be nicer. I still really like this song a lot :)
(I am forever jealous of Maimi's abs.)