The Sket-dan is roped into helping with Onee-san's ex-kid's show's stage performance, but they never would have thought it'd turn into a race against time to bring smiles to children's faces and prevent severe bodily harm to themselves!
Our biggest problem is not 
being able to grasp the lock,
Nuestro mayor problema es que no podemos abrir el cerrojo,
Nuestro mayor problema es que no podemos abrir la cerradura,
Nosso maior problema é não
 conseguir pegar a fechadura,