The Amusement Club is cleaning the club room in preparation for new students and perhaps new members.  Opening a mysterious closet they discover a device that sends Akari back in time, with she takes as a chance 

to fix her mistakes.
I've really traveled 
one year into the past...
De verdad he regresado a un año atrás...
Es verdad que he vuelto un año atrás en el tiempo...
Eu viajei mesmo um 
ano para o passado...