I love this game a lot. Very interesting story. Just so I don't give any spoilers. Route 1, 2 and 3 have a relationship direction to a certain character but what about route 4? And how can I get to route 4?
Thank you for the kind words. Route 4 is accessible via a special password that you should discover over the course of the game, though you have no real way to access it at the moment without guessing! I'd suggest waiting for the other three routes to be finished before accessing route 4 anyways.
