The story takes place in a massively multiplayer online virtual reality game called NewWorldOnline. Under the recommendation of a friend, Maple (voiced by Kaede Honto), a rookie girl who has never played a game, stepped into the game world for the first time. Due to the lack of game common sense, in the initial skill point allocation, Maple put all her skill points on defense, so she accidentally became a "meat shield" type character that could not be harmed by any attack. Accompanied by her friend Risa Shiromine (voiced by Ruriko Noguchi), Maple embarked on her journey. Maple, who had no offensive power, soon discovered that in this world, she could not be killed even by a rabbit of level 1, but at the same time, because of her superior defense, enemies with much higher levels than her could not hurt her at all. Such Maple unexpectedly became an indispensable and important existence in the team.