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.
So after spending all this time with him,
¡Así que después de 
pasar tanto tiempo con él,
¡Así que después de 
pasar tanto tiempo con él,
Então depois de passar todo
 esse tempo com ele,