Eminence in Shadow [TV]

Premise. In modern-day Japan, a boy named Minoru Kageno aspires to be a mastermind, exerting power from the shadows. During his clandestine training, an unforeseen accident occurs when he gets hit by a truck, leading to his untimely demise. To his surprise, he finds himself reborn in a fantastical realm as Cid Kagenou.