What is "urya-oi!!!"

is the first and only "Best-of" album released by Japanese idol group BiS. The album contains tracks spanning the group's career, and all tracks that were originally released under an earlier lineup have been re-recorded by the final lineup. The instrumental parts for most of the songs have also been re-recorded. The album contains one completely new song (Tada Naite), which is also the last song released by BiS. This album is the last CD release by the group before their disbandment.