Ore dake LV Up Suru Skill Gacha de, Mattari Dungeon Tansakusha Seikatsu mo Yoyuu desu

The protagonist, Asumi Ao, who was living the life of a corporate slave, is transported to another world, Windamia, by chance. Ao wakes up in a cave and is befriended by a mysterious gacha machine. When he inserts a coin and turns the lever, useful skills appear one after another and become his own. Source: MU