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.
What are you gonna do if he gets serious?
ماذا ستفعلُ إن أصبح جادّاً؟
Was macht ihr,
wenn er ernst macht?
¿Qué harás si va en serio?
¿Qué harás si va en serio?
Allez-y plus sérieusement !
Come pensate di cavarvela 
se inizia a fare sul serio?
E se ele começar a jogar pra valer?