You may have answered incorrectly during the dialogue with him in the mall, check out this guide, it details all the routes and what to do on them. https://docs.google.com/document/u/0/d/1LkXWll0_8kVL23hHWWySoRwKL_4dyluPHeLQsnhvwuE/pub?pli=1#h.fkapub2zoqv4