I simply LOVE rainy day. I think it sounds lovely, like a blend of HANABI, kingyo hanabi and something else, RAINBOW perhaps?.... It's really one of the most beautiful ayu-songs I've heard. Truly.
I've found a new favourite song. THis songs makes me want to sit in front of a fire with a hot cup of tea in the early autumn evenings......
Edit: It just seems so entirely meaningless and stupid why she released B&D crap insted of this...? Perhaps I should just be happy none of the other album songs are like that awful single.