Rule Horror: The Seven-Day World

(No harem, no formulaic plot, no invincibility, no System, no brainless characters, no wish fulfillment, no supernatural horror) For the sake of a hundred million in prize money, I took part in countless games. I thought I could leave as soon as I collected enough coins, but then everyone began awakening supernatural powers from the Seven-Day World. After finally escaping that hellhole, I never expected to “voluntarily” return to this world. Which one is real, and which world is just a dream?