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.
Valedictorians aren't prestigious, 
they're perverts.
Los estudiantes con honores no son prestigiososos, son pervertidos. 
Los estudiantes con buenas notas no sois sobresalientes, sois unos pervertidos. 
Então pessoas como você não 
são perversas, são pervertidas.