Seiichi arrives at Barbador Magic Academy, where he's appointed as the new teacher in charge of F-class, a group of problem students, in order to save the academy.
all this time, without 
permission from us teachers?
ohne uns Lehrern
etwas davon zu sagen?
sin avisarle a los maestros?
sin avisar al cuerpo docente?
sans en avoir informé
les professeurs ?
senza il permesso di noi insegnanti?
sem dizer nada a nós, professores?
ошивались, даже не спросив 
разрешения у учителей?