Anyone know about Ensemble Stars! 'Chuseok Festival'?

Among Valkyrie's songs, I like 'Enchanting Play' the most because it's the song used when Valkyrie revives during the Chagall Chuseok Festival. They performed the incredibly cool choreography, surprising Fine, and did a fantastic job, but it lacked mainstream appeal and they ended up losing... Artistically, they were overwhelming, but Valkyrie had just fallen from the old Valkyrie and appeared a bit later, during a time when students didn't know them well. Even so?!?!?!?! They did so well!!!!!!!!! It's one of my cherished songs because it has such a deep story.