This is a cover of the song "No, Thank You!" (originally performed by Ho-Kago Tea Time) Featuring Perfect Sloth on vocals. The original song and copyright belongs to Pony Canyon.
The original artwork can be found here: http://www.pixiv.net/member_illust.php?mode=medium&illust_id=28976726
Places you can find Perfect Sloth:
Other places you can find me: