Living Towards Death and Dying Together

I met a girl for the first time, she was beautiful and smart. She invited me to accompany her, and I gladly accepted. During my travels, I accidentally learned that she was a fox demon. I told him that I am a cultivator of immortality. She asked me, is it fun in Xianmen? I told her I didn't know. A story about a fox demon and a fairy who fell in love until they died together.