Ryuken has been murdered! If they want to get their student ID, the three brothers must find the true culprit. When Ryuken and Yuria take a tumble down the stairs together, they accidentally switch bodies. The strange situation is complicated even further when Shin arrives... Thouzer and his gang make their passionate singing debut as Nanto DE5MEN's first single is unveiled.
Whoever finds the killer gets
the right to enroll here!
من يعثر على القاتل يحصل
على بطاقة التلميذ
Wer den Täter findet,
bekommt einen Schülerausweis!
¡El que encuentre al culpable 
tendrá una identificación estudiantil!
¡El que encuentre al culpable 
tendrá un carnet de estudiante!
Je ferai admettre à l’école
celui qui trouvera le coupable !
Chi riuscirà a scoprire il colpevole 
otterrà un tesserino!
Quem encontrar o culpado,
 ganha uma carteirinha!