Hello, we're so glad you enjoyed the demo! As for your questions:
1. Other than some random romantic relationships in the background here and there, generally all the bonds in the game are intended to be portrayed as platonic. That's not to say we're against shipping though! (Within limits sdfjkkg)
2. The game will indeed have different routes/endings! 2 separate routes and 4 endings to be exact. The routes are affected by your actions, but not in the usual sense where it relies on choices per se. That's all we'll say for now to avoid spoilers!