Earth with Dungeon: Koyuu Skill “Touka Koukan Store” o Kushi Shite Sekai Kyuusai o MezashimasuEarth with Dungeon ~Koyuu Skill "Touka Koukan Store" wo Kushi Shite Sekai Kyuusai wo Mezashimasu~; アースウィズダンジョン～固有スキル≪等価交換ストア≫を駆使して世界救済を目指します～; Earth with Dungeon ~Koyuu Skill "Touka Koukan Store" o Kushi Shite Sekai Kyuusai o Mezashimasu~; Earth with Dungeon: Let's Aim to Save the World by Making Full Use of Our Unique Skill "Equivalent Exchange Store"

It has been several decades since dungeons made their appearance on Earth, bringing along rampant monsters. Due to the contamination of the mana caused by the dungeons, people gained powers called ‘skills’, but it is not like the adventures that people see in tales and legends. Many towns were abandoned, the economy declined, and the world was filled with lawless areas, slowly inching towards extinction of the human race. In a ruined town where death is always around the corner, Amano Mamoru continued to hone his skills day and night. Together with the mysterious girl Shizuku, with whom he shares the same fate through the skill “Remaining Lives”, and with his unique skill “Equivalent Exchange Store”, he will challenge the world’s coexisting dungeons!