Oh. Oh, so that was the mistake! I didn't notice the typo at all. When surasshu said "it says "girls" as it should", I thought he meant it said just "girls" instead of "boys and girls". Since almost all touhou characters are girls, you know.
It says: original song "Nishoku renka chou (Two-color Lotus Butterfly) - Ancients" by ZUN (Team Shanghai Alice); song arrangement by ARM (IOSYS), sound arrangement by Kashiwagi Ruzarin (Denkaiseisakusho), lyrics by Hikura (IOSYS), vocals by miko (Alternative ending)