It's the night before the Mai High Festival.  Keima and Chihiro are alone on the roof of the school.  Chihiro seems confused by Keima's behavior, but he continues with his conquest.  But as Keima makes his move, Chihiro says something unexpected.
I'll check to make sure they weren't bugged.
Revisaré para asegurarme 
que no los siguieran.
Revisaré para asegurarme 
de que no los pillen.
Vou verificar para me assegurar que
 eles não foram incomodados.