#2 by FantasyFan - Mar 2 2013
If you offer to give him your soul, he'll reveal his true intentions, then you'll get a chance to say one last thing to him. If you want a romantic ending, tell him you still love him.
Then take gym class soon after Potsam rescues you. Cast Spirit Echoes in the gym to see what happened after you passed out.
Soon after this, Damien will send you a letter. Wait until tomorrow, then agree to meet him.
When you meet him, say you still care about him.
Soon after this, Damien will send you another letter asking you to plead to Professor Potsam on his behalf. If you DO plead for him, your roommates will find out that you're still seeing him and get made at you. If you DON'T plead, later on Damien will send you a ring. Put it on.
If you DO plead to Professor Potsam, at the final exam your roommates will demand that you swear an oath that you'll never speak to Damien again. If you refuse to swear the oath, you'll still get a romantic ending with Damien, but you'll fail the final exam and get transferred to Snake Hall. If you DO swear the oath and then try to talk to Damien when he comes to see you at the prom, you'll lose all your magic and then you and Damien will run away together.
If you DIDN'T plead to Potsam, wear the ring and Damien will try to see you at the prom and you'll dance with him without getting into trouble.