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.
Something huge is about to happen here.
Algo grande está ocurriendo.
Se está cociendo algo muy gordo aquí.
Algo grande está prestes a acontecer.