The Ghost-Harvesting Tycoon

Cash-strapped Jasper is pulled into a Thriller Game, awakening the Exam-focused Scholar class, with the ability to force ghosts to answer multiple-choice questions! He treats the game as a get-rich-quick paradise, forcing Sadako to do Square Dance and running a Bloody Barbershop for profits. Jasper uses his talent to outclass evil ghosts, becoming the top tycoon of the Thriller Realm and attracting a goddess wife. This is total domination of the underworld!