It's the beginning of the new semester at Hakuou Academy. Hayate is eager to start the new school year, however Nagi has fallen ill and will not be going.
Right around then, not knowing any 
of this at the Sanzenin residence...
Mientras tanto, en la mansión de los 
Sanzenin y sin saber nada de esto...
Enquanto isso, na mansão Sanzenin, 
sem saber de nada disso...