Dungeon Seeker

Dungeon Seeker (ダンジョンシーカー) is a light novel series written by Sakamoto 666 and illustrated by Gia.

The novel series was adapted into a manga series by Mizu Seijuurou and published by AlphaPolis Web Manga.

Plot
Junpei Takeda, a high school student, is childhood friends with Noriko Tatsumiya and the bully Kido Shouta. One day, during the usual course of bullying Junpei, they were suddenly summoned to a different world by the whim of "God." They must be summoned Heroes with cheats, or so he thought. But it turns out that Junpei's stats are even worse than an average farmer's. Tricked into a deadly labyrinth by the only one he trusts, he walks the path of revenge.