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.
and your daddy collecting sand for decades...
...وجمع أبيك للرمل لعقود
während dein Papa den Sand über
Jahrzehnte beharrlich gesammelt hat.
Y Byakuya reunió arena durante décadas.
Y Byakuya reunió arena durante décadas.
et ton père a récolté du sable
pendant des dizaines d’années.
Mentre il tuo caro papà 
ha raccolto quella sabbia per chissà quanti anni.
E o seu pai ficou reunindo 
areia por décadas.
твой папа десятки лет собирал песок.