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 find this sort of 
thing very interesting.
Encuentro este tipo de cosas muy interesantes.
Este tipo de cosas me parecen muy interesantes.
Acho esse tipo de coisa bem interessante.