Kohaku has located the treasure left behind by Byakuya and the others, but it's encased in concrete. Senku has to devise a plan to quietly get at the contents inside, so as to not alert the guards.
It might not be useful at all.
.وقد لا تكون مفيدة البتة
Aber vielleicht wird es auch …
rein gar nichts bringen.
O quizás no sirvan de nada.
O quizás no sirvan de nada.
Tout comme ça pourrait
se révéler inutile.
Oppure potrebbero anche non servire a nulla.
Pode não ser útil...
А могут оказаться совсем бесполезными.