Waking up to a dungeon in the morning

A hotly anticipated work that depicts what would happen if a dungeon appeared in the real world! High school students conquer a dungeon in real life! [Breaking News] When they wake up in the morning, dungeons have appeared all over the world. What's more, a dungeon has appeared in the drawer of Kokonoe Daiki's room, too! While worrying about the endless slimes that keep appearing, he continues to hide the drawer dungeon. The world has suddenly become a "dungeon boom". Then, caught up in the family circumstances of his friends Hirose Yuji and Hiiragi Yukino, who should be calmly assessing the times, Daiki and his friends decide to get their dungeon exploration licenses. After successfully passing the qualification exam, the three finally begin to explore the dungeon... but it's much tougher than they imagined! In a real world where resets are impossible, ordinary high school students take on a dungeon overrun by monsters!