It's a nice ballad, slow, very pretty song. =3
According to some comments written on Youtube it says that the person who wrote this is the same who wrote ''Love in the Ice''.
I think it's Bolero though I had imagined something else due to the name (which is a Spanish word, and also a kind of music genre where you dance very close to your partner and almost like hugging..I can't remember XD) I thought it would be more..ah how to explain..dunno ..a faster song, hand't imagined that it would be a ballad, but it's nice I must admit, I'm really looking forward to their single, it's gonna be great. (though now I think it might be ''wasurenaide''..instead of Bolero..ah whatever XD dont listen to me on this lol)
If you want to pre-order their 25th single then go here