umm i need some help in wild arms 5

ok so here's the problem

im trying to get passed the hill side runis but once i get to area 018 the door wot open it just says

*Stand before me, all of you, clothed in the sprit of youthful gaiety.

then dean says

- ...What's that supposed to mean?

then it reads

*Those days of youthful laughter pass by so quickly...



i am stuck and have been for about 6 weeks i searched every where but nothing any where came up i even tried attacking the doors with the arms and the slide so can some one please help me please

thank you please help

Equip the School Uniforms to every character, the try to open the door. It should open.

A School Uniform for each character is available in the Black Market.