Kou Xue had two lives, neither of which ended well.
In the first life, he loved someone in the wrong way.
In the second life, he loved someone with all his life.
Ten years later, he returned as an evil ghost.
I don't remember who I am or who I loved.
I only remember three words - Lost Butterfly Valley.
He didn't know that that was where he buried himself.
Concept: A story about "people who don't know how to love, finally learn to be loved".