Arifureta Shokugyou de Sekai Saikyou

When a classroom of students is transported to another world to act as its saviors, Nagumo Hajime finds himself the weakest link. As his friends and classmates are granted strong classes and impressive abilities due to their existing skills, he is given the weak title of Synergist. When a dungeon quest leaves him separated from his group, Hajime must discover his own talents or be left to rot in this world forever.