Not only do we have yet another weird and wonderful Shiraishi Minoru ED for ep14, but we have a bit more info about hte first set of EDs.
On a radio show last Saturday, Tsukasa's seiyuu, Fukuhara Kaori, said that they did all the songs in one take, making it like a real karaoke session. The full versions on the soon-to-be-released CD can be previewed on YouTube. Links from my blog post
here. Hirano Aya previously said that she was asked (at the last minute) to do her songs
exactly like the originals, in terms of breathing and phrasing.