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.
I turned this into a bad 
experience for Matsuoka...
Convertí esto en una mala experiencia
He convertido esto en una mala experiencia
Fiz esta ser uma experiência
 ruim para o Matsuoka...