The artist is OSTER project: http://www.muzie.co.jp/artist/a017591/ Be sure to visit their site for more info / download link.
to download music from the site, just right click on the "mp3" button located to the right of the song title and perform a "save link as".
Please feel free to comment if you'd like, or if you have any questions.
Thanks, and enjoy.
Disclaimer: I do not own any image(s) & music used in this video in any part. Full credit goes to their respective owners.