"Would you like to enter a never-ending game?"Yamada Kenichi, a hardcore gamer, stumbles upon a mysterious online game without a title. Without hesitation, he chooses the highest difficulty level, Hell Mode. In an instant, he is reincarnated as a serf named Allen in a different world! As the boy Allen, Kenichi aims to master the mysterious profession of Summoner and become the top dog in this new world without guides or online forums.