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.
They said they were 
studying together today, too.
Dijeron que estudiarían hoy, también.
Dijeron que estudiarían hoy, también.
Eles disseram que vão estudar
 juntos hoje também.