It's the jungle this time! Suzuki Iruma, a human boy, starts attending the demon school where "Grandpa" is the headmaster after becoming the great demon Sullivan's "grandson." Iruma succeeds in his new setting, making friends and advancing in demon rank while conquering the terrifying challenges that are put in his path! There will be new challenges in the upcoming season... Harvest season has arrived, which means it's time for the yearly test where students must venture into the vast and exceedingly dangerous (!) forest in order to compete for food. What happens when rivalry amongst classmates ignites into a titanic struggle of strength and cunning?