I felt like I got the end already. I had an amicable conversation with Masumi and told her I was happy for her, then the wizard said 'that was rough' and sent me back. It was the best ending I could assume you'd get so I'm not sure why he said that.
An ending where the protagonist hooks up with Masumi would be rather unfitting considering the themes and messages this game is getting across to the player, but that's just my take on it. There is a "true ending" and it simply requires you to explore all the different routes.
