Lol Kokuma, Red Angel is one of my faves too - but in the link you have provided the Days one.
I think its the Pocket Biscuits, or is is Bisquits? :S
^_^ I wonder if I can get the Pocket Biscuits CD from somewhere, it is called colourful, how funny
Here's couple of more of their songs;Red AngelMy Diamond (live)
Red Angel is my favourite this far.
Wikipedia has no page of Pocket Bisquits, but in one Youtube comment someone mentioned that the band exists no more as the lead singer Chiaki got marriage and gave up being a rock star.
As soon as school starts up again I might go for getting the songs off of the videos
They sound pretty neat! Just need adobe audition and away I go!