In the 48th issue of Weekly Shonen Jump, it was revealed that Akira Ishida and Aki Toyosaki are joining the cast of Dr. Stone as the characters Hyoga and Homura, respectively. They are members of the Tsukasa Empire.
Viz Media summarizes the Dr. Stone story as:
One fateful day, all of humanity was petrified by a blinding flash of light. After several millennia, high schooler Taiju awakens and finds himself lost in a world of statues. However, he's not alone! His science-loving friend Senku's been up and running for a few months and he's got a grand plan in mind—to kickstart civilization with the power of science!
Viz Media summarizes the Dr. Stone story as:
One fateful day, all of humanity was petrified by a blinding flash of light. After several millennia, high schooler Taiju awakens and finds himself lost in a world of statues. However, he's not alone! His science-loving friend Senku's been up and running for a few months and he's got a grand plan in mind—to kickstart civilization with the power of science!