Oh, my gosh. This cover... It's so amazing. ; A; Her voice is full, and she did a decent job doing the rap.

http://soundcloud.com/kyoung06/piano-ver 

The editing isn't the best. (Well, it's SoundCloud, after all.) But it is very good, because I probably couldn't do any better. XD I like the harmonies at the end, and--GAH. I just love everything! ^^ She reminds me of this one Japanese singer... She recorded a cover of "Just Be Friends." WHAT WAS HER NAME? >.< *goes to YouTube*

Yamai. That's her name. XD Here's a link so you can hear the resemblance~ --> http://www.youtube.com/watch?v=6BXN8p2z60Q 

And I have no idea where the girl who did the cover of "On Rainy Days" got the sheet music for the piano, but I want it so badly!! T.T If she made it herself, then I applaud her. I have no patience to make piano versions of songs. Only a cappella versions. XD Anyway... Share this with a fellow b2uty if you want~ :)