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.
Otherwise, Chizuru will 
take the stage again.
De otra manera Chizuru retomará el escenario.
Si no Chizuru volverá al escenario.
Senão o Chizuru vai assumir de novo.