It's the season for student teachers at Mai High.  Keima's class gets Miss Nagase, a cheerful pro wrestling fan who has great hopes and dreams about becoming a teacher.
However, her attention is immediately drawn to a problem child who plays games during class (...Keima, of course).
The other teachers have already given up on Keima's attitude, but Jun is inspired to save him...
They'll only be with us for two weeks,
Solo estarán aquí por dos semanas,
Solo estarán aquí dos semanas,
Eles só vão ficar conosco 
por duas semanas,