While on the way to school, Hayato discovers that Karen isn't wearing panties. He spends the rest of the day trying to avoid seeing under her skirt...but Karen still seems a little upset.
Put on your PE uniform or something!
Zieh dir deine Sportkleidung an oder so!
¡Ponte tu uniforme de deportes o algo!
¡Ponte tu uniforme de deportes o algo!
Mettiti la tuta da ginnastica
o qualcosa del genere!
Coloque o uniforme de 
educação física ou algo assim!