Light Novel Volume 9

Kaifuku Jutsushi Yarinaoshi 9 ~ Sokushi mahou to Skill Copy no Chouetsu Heal ~ is the ninth volume of the series, that was released on December 26, 2020 in Japan.

Official Summary
Keyaru and his harem kill the demon lord and establish eve Reese as the new one while the jioral king uses the power of immortality to take over the world all to be beaten by keyaru and his harem as there is more to the world than it seems