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.
What are we going to do if 
Shun's earlobes are soft?
¿Qué vamos a hacer si los lóbulos de Shun son suaves?
¿Qué le vamos a hacer si los lóbulos de Shun son suaves?
O que você vai fazer se a do 
Shun também for macia?