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.
but I didn't even interact with you in spring!
pero casi no nos conocíamos entonces!
pero casi no nos conocíamos entonces!
mas eu nem interagi com 
você na primavera!