Shun's younger brother Fuyuki and his girlfriend Mamiya-san kissed.  When Shun finds out, he asks his friends what he should do as Fuyuki's older brother.
Fuyuki ignores his brother and goes on a date with Mamiya.  The gang decides to follow the couple on their date and end up at a karaoke box.
How long did they say 
they were using the room for?
¿Cuánto tiempo dijeron que usarían el salón?
¿Cuánto tiempo dijisteis que usarían el salón?
Por quanto tempo eles disseram 
que iam usam o quarto?