Sara: "Hey, that sounds kind of like..."
new endtheme: *plays again and sounds even funnier*
Sara: "...several of the Seigaku regulars singing?"
new endtheme: *plays yet again and is clearly Ryoma singing his little brains out*
Sara: "oh holy asldkfjadf i love this show."
yes, that's right, it's the VOICE ACTORS singing the endtheme. apparently four of them made a band to release this single. and then in retaliation, the other five regular voice actors made ANOTHER band and released their own single.
also, evidently Fuji and Tezuka refuse to sing by themselves. *snerks*