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.
You're supposed to go 
flamboyant. Really flamboyant.
Se supone que deberías hacerlo extravagante. Verdaderamente extravagante.
Se supone que deberías hacerlo exagerado. muy exagerado.
Você tinha que ser extravagante.
 Muito extravagante.