Lynn， who traveled to the continent of sword and magic， became the only son of the king of Thorn Castle.Just when he was enjoying the wonderful life in the other world， a sudden force of orcs besieged the castle!At the critical moment of life and death， the desperate ones could only pray to the gods for blessing!But the gods did not answer them! Orcs' iron hooves are about to break through the city walls!At the last moment， they finally made up their minds and prepared to summon the Demon!After the tedious summoning ceremony， Lynn suddenly realized that the summoned Demon... Surprisingly.........was himself!This novel and its characters are purely fictitious.