At last Haruki realives Kazuma's true feelings, but while he's confused at this sudden turn of events he can't hide his joy that the girl he loved best likes him too.
I just do whatever...
Ich handle so. 
Me voy con la corriente...
Sigo la corriente...
et je décide toujours 
tout à la légère.
Eu simplesmente sigo o fluxo...