Picked it up yesterday. As Glat says, it seems to be a 2/23/11 release. 100 years from now, that's going to confuse people.
In the lyrics sections, there are specific words and phrases highlighted in red.
For "Sora ga," the title is highlighted, along with the kanji in the words 残って and 響いている . When you combine those two kanji, you get 残響, meaning "echo" or "reverberation." Those two kanji are positioned on the EXACT same horizontal plane of text, and if you hold the booklet up to the light in just the right way, the other characters disappear and all you can see is the song title and 残響 in red.
I think that's pretty cool.
"Onna no ko" isn't that clever. Just the song title and "Like a virgin" (in katakana characters) are highlighted in red.