Dungeon Seeker

One day, Junpei Takeda, a high school student, was summoned to another world by a "god" on a whim, along with a delinquent, Shota Kido, and Junpei's childhood friend, Noriko Tatsumiya. They thought they were summoned as heroes, but for some reason, Junpei's status was worse than that of a villager.