In a world where grim reapers maintain the delicate balance between life and death, Velius, a reaper, cherishes his mortal 'son' Ende. Ende, unaware of Velius's true nature, adores his father and remains blissfully ignorant of the grim duties he undertakes. When Ende is invited to join a school alliance, he must reveal a deep secret to be accepted. As Ende's innocence leads to unexpected actions from Velius, a forbidden love unfolds, leaving Ende oblivious to the profound consequences.