Dekkkkarian

Gakuto Watari is a highly educated elite, but his extreme arrogance about his academic background has led to his total defeat in the job hunting wars, turning him into a toxic NEET who does nothing but lurk on internet message boards. Suddenly, he is abducted by giant aliens known as a "Dekkkkarians." Under the guise of "rehabilitation," he is forced into manual labor in a mysterious underground facility alongside other middle-aged men mooching off their parents. Naturally, his high-spec pride refuses to tolerate such tyranny and oppression. With a brain packed with extensive knowledge, he prepares to shut them down with logic and debate—or at least he would, if he weren't too terrified and overwhelmed to muster the courage...