High School for Dungeon Prep: Class D Is Full of Oddballs

[Sky screen dungeons descend + school life + problem children + goofy comedy + romance + one female lead + coming-of-age + mostly slice of life.] Eleven years ago, an endless sky screen suddenly descended over Blue Star. Pale blue walls of light cut off the heavens, forcing reality to overlap with dungeons in other dimensions. An apocalyptic transformation swept across the globe. When dungeons descend, life and death are no game. Entering one means a genuine struggle for survival, and death is permanent. After four long years of panic, chaos, and slaughter, humanity was forced to face reality. To secure the continued survival of humankind, the nations of the world joined forces seven years ago to establish the Sky Screen Administration. Numerous high schools dedicated to preparing students for dungeon incursions were established around the world. The three years of high school were three years of trials, as well as the dividing line that determined one’s future social standing, survival, and worth. All teenagers of the appropriate age were required to enroll. Each grade was divided into four classes, A, B, C, and D, with resources allocated unevenly, students sorted by strength, and strict rules in place. Everyone fought tooth and nail for a place in Class A or B. Only Class D was known throughout the school as a holding pen for problem children...