Boruto's new mission is to guard Tento, who is obsessed with ninja and collecting X Cards. He begs Boruto to teach him ninja skills, and Boruto thinks this will be a good opportunity to knock some sense into Tento. Meanwhile, the Mujina Gang, which had been laying low after Team 7’s infiltration mission at Hozuki Castle, rears its ugly head.
If you don't keep at it,
muscle memory can fade.
إلّم تواصل التمرّن، قد تتلاشى ذاكرتك العضلية
Wenn man nicht ständig am Ball bleibt,
bauen sich die Muskeln ab.
Se non continui a farlo, 
il corpo se ne dimenticherà subito.
Se não continuar, pode
perder a memória muscular.
Забросишь — и тело мигом разучится.