There is, I'm not sure if there's another way to do this, but if you, AFTER getting the nil ending, go to "Memories" and go to the last page. Once you do this, select "Partially erase memories". This unlocks new dialogue. Pick all the bottom options until you're at scenes you haven't seen any version of, like Time and Space staring at each other lovingly, with Space's hands on Time's shoulders. At this point, just do what you want, leaning toward a good ending of course. I might be missing some things or mixing up some things so go ahead and experiment with details I haven't covered.