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.
Huh? Not impossible to do what?
¿Eh?, ¿qué cosa no es imposible?
¿Eh?, ¿qué es lo que es imposible?
Hein?
 O que não é impossível?