召喚バグで現代最強～クラス全員が異世界に召喚されたと思ったら一人だけ残されて謎の組織に連行されたんだが～ (Associated Names)

All my class was summoned to a parallel world! Well, that’s what he thought, but Hikasa Eiji alone was left behind in his world. As he lamented the loss of his classmates, he was suddenly taken by a group in all-black outfits from a mysterious organization. They called themselves sorcerers; it was an organization set…