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...
I'll teach you how fun school can be!
¡Te enseñaré lo divertida 
que es la escuela!
¡Te enseñaré lo divertido 
que es el instituto!
Eu vou te mostrar como 
a escola pode ser divertida!