Jun is doing her best to meet the expectations of the students.  She's very popular with the students, but she's been possessed by a loose soul.  And so, Keima begins his conquest of Jun.  However, she's preoccupied with becoming the ideal teacher, so she only sees Keima as a student.  In order to break free of the teacher-student mold, Keima decides to approach Nikaido, who was Jun's senior in school...
That's how it goes in the real world.
Así es el mundo real.
Así es el mundo real.
É assim que o mundo real funciona.