身为读模成绩优秀的新堂衣宇，和体弱多病总是请假的箱崎红末。正觉得这两人的组合很稀奇的四谷友助，下一刻就进入了异世界。只能操纵空气运动的新堂，和明明是战士却不能挥剑的箱崎，以及武器只有锹和镰刀的四谷，这个几乎毫无战斗力的队伍，向强敌山精发起挑战。

新堂和箱崎被山精吞噬无法复活。在独自战斗的危机中，四谷转职为新职业料理人。用料理人的技能救出二人，艰难打倒山精的四谷等人，作为通关报酬，看到了10周目通关后的世界。而看到那里的光景，四谷想到了一件事。

从游戏管理员处接到搭讪某位女生任务的四谷，潜入高中的女厕，救出了被同学霸凌的时馆由香。时馆成为了第四个同伴。被召唤到异世界的她，由于自己的随波逐流，面对强大又美丽的新堂产生了憧憬。然而新堂也有无法与人言说的过去。

一行人开始了下一次任务，要去西边的城镇拉多德博。但是，途中新堂被盗贼抓住。箱崎和时馆打算去营救，四谷则持相反意见要继续赶路，两方分头行动。而四谷为了得到马匹参加了柯鲁多内尔的武术大会，与女骑士卡哈贝尔相遇。

四谷在卡哈贝尔帮助下救出同伴。卡哈贝尔提出以教授不会死的玩家们剑术为条件，与四谷一行人一同前往拉多德博。途中发现哥布林的一行人发起遭遇战。因为自己的无力和觉悟不足，在战斗中拖后腿的箱崎，终于下定决心，亲手杀死哥布林。

四谷等人救下了遭狗头人袭击的一行人。那是移送异教徒至拉多德博的独裁国家帝欧克王国的部队。帝欧克士兵的目的是在拉多德博处决异教徒们。四谷等人不解任务真意，与帝欧克兵、异教徒一同前往拉多德博。

在不信任四谷等人的帝欧克兵卡密鲁托的设计下，一行人被关进了有古代机关的洞窟中。四谷掉队，其他三人与卡哈贝尔挑战难敌石像鬼。卡哈贝尔被石像鬼击败，陷入绝命危机，新堂则升上10级转职为战士（剑），总算是击败了石像鬼

在四谷的策略下成功夺回异教徒，卡哈贝尔也为部下比姆兹伯格报了仇。新堂和箱崎一组寻找送往拉多德博的货物，四谷等人也和异教徒一起前往拉多德博。路上，在意四谷和卡哈贝尔关系的时馆，为了撮合二人，尝试了某项事件。

After successfully delivering their cargo to Radodorbo, Yotsuya and the others part ways with Kahvel and split up to cover ground in four different directions so they can complete their quest to cover 5% of the map. It shouldn't be a difficult task if all went as expected, but a sudden blizzard impedes their progress...

The progress of all four party members is halted by heavy snow as time continues to tick away. What's worse, if anyone freezes to death, they can't come back to life until the weather they revive in becomes survivable again. The party grows desperate. Yotsuya gets lost in an underground dungeon that he unexpectedly fell into, Shindou walks across a frozen lake without realizing how thin the ice beneath her feet is, and Hakozaki is unable to progress any further. As the party members lose their lives one by one, Tokitate, the last one alive, is ready to give up...

As her reward for completing the quest, Tokitate gets to ask the Game Master whether this alternate world is actually virtual or not... and the answer is that it's an alternate Earth that branched off of the original Earth's timeline. Upon hearing that it's an existing world, Yotsuya trembles with the realization that he killed real people. Once he returns to the real world and resumes his normal life, the Game Master appears before him in the form of a young girl and leads him to a meeting with the next new player.