Nanashi no Game

Rumors have been circulating about a cursed role-playing game; anyone who plays it and does not complete it dies seven days after starting. You are one of the victims playing the game; having started playing it several days after your friend recommended it to you. You visit your friend’s apartment to discover he is already dead. Starting that day strange things happens to you; everything you experience in the game resembles something in real life, and so-on.