This CD has an unlisted secret track, a chiptune version of "Confrontation". This is hinted in the blog: 'there are 7 tracks, one for each star in the Big Dipper, but "Alcor" is close so maybe...' (this is related to the game's plot).
This blog has pics of the CD, which in turn has pics of the staff, "Ryota Kozuka" is used here rather than Koduka (both are correct romanizations).
I think the secret track may be Kitajoh's as he arranged only one song and also did a chiptune in Hospital OST, or maybe Meguro since he's listed in the jacket.
B06 was purposedly left like that to keep the name secret, it's "Akashic Records" in the OST.