Making cell phones takes a lot of materials and tools. Senku begins by upgrading their equipment using the waterwheel Chrome and Kaseki invented and built together.
Ryu-san?
ريو-سان؟
Saures Schwefelinchen?
¿Fúrico?
¿Fúrico?
Sulfie ?
La signora Acido Solforico?
Ryuu-san?
Богиню?