Shinya Mamiya, an impressionable modern youth, carries a "trauma."

That experience instilled in him a profound sense of powerlessness and a singular conviction.

In the winter of his third year of junior high, Shinya Mamiya is suddenly transported to "New Toto," the capital of a parallel-world Japan.

Immediately after his transfer, he confronts insectoid monsters known as "Karaju" and awakens as an "Overlord," an individual with special abilities to combat them.

Becoming the thirteenth "High-End," a top-tier Overlord of whom only twelve are said to exist worldwide, he enrolls in "Shinonome Academy," a military academy for those with special abilities and a school for Overlords.

By some twist of fate, people who also carry "traumas" gather around him.

A quirky Russian beauty, a yandere-esque younger sister, a sassy cross-dressing boy, etc.

His chaotic academy life is intertwined with a life as a soldier protecting people from the Karaju.

Furthermore, selected for a newly formed student special unit, he, the "Toughest," is unwillingly drawn into a world-engulfing battle.

※This story is a work of fiction. It has no relation to actual persons, nations, or corporations. There is no intention to disparage any specific race, nation, or religion.

※Chapter 1 serves as an introduction; the school-life elements begin from Chapter 2. A synopsis for those who wish to read only that part is provided at the beginning of Chapter 2.

※Titles were changed on 2019/8/10 and 2019/10/12. (Former former title: It Seems I *Was* the Strongest in Another World → Former title: After Awakening as the "Hardest" Overlord in a Parallel World Swarming with Insect Monsters, I Enjoy My Overlord Military Academy Life. → Current title: The Overlord of the Black Coffin - "Hardest" Supernatural Academy Life in a Swarming Parallel World)

※Also serialized on Kakuyomu.