Well it’s not a crossover actually, but two my favorite characters together.
Obviously Amy met Chris and they fall in love, but Chris has his secrets and he doesn’t want to reveal them until a demon almost kill he can save her. Everything seems Ok,but Chris still behaves reserved. Amy doesn’t like it especially then Chris is almost become evil and only the Halliwell sisters could save him. Amy and Chris have a fight, Amy is angry because Chris didn’t trust her fully and it almost cost them