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.
Then we didn't need a great detective.
لم نكن بحاجة لمحقّق عظيم إذاً
Dann brauchen wir auch
keinen großen Detektiv.
Entonces no necesitábamos al gran detective.
Entonces no necesitábamos al gran detective.
On n’avait pas besoin
de détective, alors.
Quindi non ci serviva un detective.
Então não precisamos 
desse grande detetive!