Kohaku’s sister, village priestess Ruri, is gravely ill. Senku, Chrome and Kohaku begin their quest to make antibiotics to save her life.
Wait, what is iron, anyway?
ما هو الحديد على أيّ حال؟
Was ist Eisen eigentlich?
Mais c’est quoi, au fait ?
Explique-nous tout !
Cioè, tanto per iniziare, questo ferro cos'è?
Espera, o que é ferro?
Кстати, что это такое?