Kohaku’s sister, village priestess Ruri, is gravely ill. Senku, Chrome and Kohaku begin their quest to make antibiotics to save her life.
by some nameless Mongol 
sometime around the fourth century.
.من قِبل مجهولٍ مغولي في حوالي القرن الرابع
por um mongol sem nome, 
por volta do século IV.