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.
Talk about arduous labor.
.إنّه عمل شاق جدًّا
ohne Hilfsmittel mit reinem Fleiß.
Partendo da zero e con duro lavoro...
Que trabalho duro...
Усердно, мало-помалу.