Backyard Dungeon : The world is lawless from today. UG novels

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

In the middle of the night, I was awakened by an earthquake that was so big that I thought it was the end of the world. There was an entrance to a dungeon in the backyard of my house. Underground dungeons that appeared simultaneously in various parts of the world were crowded with all kinds of people to see items that go beyond human wisdom. There is a major dungeon boom that involves the nation. On the other hand, the main character Kenji Ito learns the truth hidden in the dungeons in the backyard and rises up secretly to save the world from destruction. He forms a party with his friends and childhood friends and fights with the Self-Defense Forces. Who is the fastest person to capture the dungeons with a whirlwind of desire and conspiracy?