EVERYTHING SILHOUETTE FROM THE SKYLIT. Have I mentioned that I love them/Demonsvenom? Because I do. If they do get another song, it'll probably be Closer since it seems to be their latest. They've got a lot of songs in game though, and a good selection, so I can't complain.
I didn't know yksb made Vocaloid songs, but I always thought their sound suited the Vocaloid scene (not that there's a particular style with Vocaloid originals but I think there's an influence at least; Vocaloid dogs indeed).
Okay, but semi-related, Kasuya Daisuke (Shuuzo) covered a couple of Vocaloid songs recently. http://www.nicovideo.jp/watch/sm25859755
Matsushita (松下) is a well-known singer/utaite in the Nico Nico Douga community.
And Kokoro to Karada is a Shinimonogurui song featured in the game!
Original cover @ NND:
http://www.nicovideo.jp/watch/sm26572152
A lot of comments seem impressed with how high the song goes! haha
the preorders period on amiami would have closed a few weeks ago unfortunately. it seems the only place left is amazon jp https://www.amazon.co.jp/SHOW-ROCK-%E3%83%9F%E3%83%A5%E3%83%BC%E3%83%A2%E3%83%B3%E3%82%B3%E3%83%AC%E3%82%AF%E3%82%B7%E3%83%A7%E3%83%B3-Vol-01-SBC-SB01/dp/B01N5UYHBO/ref=sr_1_6?ie=UTF8&qid=1492512233&sr=8-6&keywords=show+by+rock
and while they ship CDs and books worldwide, I don't know about something this bulky.