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...
She'll be serving as assistant 
homeroom teacher for a while.
Será la profesora asistente por un tiempo.
Será la profesora auxiliar durante un tiempo.
Ela vai servir como assistente 
de professora por um tempo.