I get it. Sacred world is Assault Lily Bouquet's opening.

But I really, really, really, really, really, really, really, really wanna listen to the rest of it! The last time I fell in love with a song this much was when I listened to On Your New Journey fully (or maybe it was the game/short version), and this is just from a preview! It probably eclipses that moment! I LOVE THIS SONG. SO MUCH.

With this and Beautiful Birthday, I'm super excited about future RAS songs. Even if Sacred world is one of ERA's TBA, that's still leaves one other TBA RAS song...

Also, in the short vid of RAS 8th☆Live, you can hear a snippet of how Beautiful Birthday continues after the chorus.