经常被同学欺凌的南云始，与同班同学一起被召唤到了异世界。与接连着发现了自己的那作弊般的能力的同班同学们相反的是，始却得到了炼成师这个平凡职业。即使在异世界也是最弱的他，被某个同班同学陷害后掉进了迷宫的深处——！？
就在找不到逃脱方法而陷入了绝望深渊的始，凭借着炼成师这个职业踏上了通往最强的道路，并与吸血鬼·月相遇了——。
“我保护月，月保护我，这样的话我们就是最强了。让我们一起横扫一切直至超越整个世界吧。”
迷宫深处的少年与在那里的吸血鬼之间的“最强”异世界幻想曲，开幕！
——然后，少年超越了“最强”。
“いじめられっ子”の南雲ハジメは、クラスメイトと共に異世界へ召喚されてしまう。つぎつぎに戦闘向きのチート能力を発現するクラスメイトとは裏腹に、錬成師という地味な能力のハジメ。異世界でも最弱の彼は、あるクラスメイトの悪意によって迷宮の奈落に突き落とされてしまい――!? 脱出方法が見つからない絶望の淵のなか、錬成師のまま最強へ至る道を見つけたハジメは、吸血鬼のユエと運命の出会いを果たす――。
The ordinary life of 17-year-old otaku Hajime Nagumo is disrupted when he and his classmates are summoned to a fantasy world and tasked with saving mankind. While his classmates are gifted with impressive abilities useful in combat, Hajime is belittled for only gaining an inferior transmutation skill that lacks any real offensive power.
During an expedition in the Great Orcus Labyrinth, Hajime is betrayed by one of his classmates, plummeting him to the bottom of an abyss. Though he survives the fall, Hajime is faced with menacing monsters and misfortunes that send him spiraling into a grim nightmare. Desperate to live and return home one day, he resolves to fight for his survival—only to meet an imprisoned vampire he names Yue, who is also seeking to escape the labyrinth. Taking an interest in him, Yue and a few others along the way accompany Hajime on his journey to find a way back home, while steadily transforming from commonplace to the world's strongest.
[Written by MAL Rewrite]
