Luo Xiaohei: They Say I Am Beautiful, Strong and Miserable?

My name is Nian Yu, and I am a little fox that has just gathered its spirit. It is all white, with a little red tail, and a strange longevity lock hanging around its neck. Don't ask me where it comes from, I don't know. Don't ask me what's in the lock, I don't remember it either. All I know is that there is a black cat named Xiao Hei in this mountain forest. He named me, helped me pick fruits, and wrapped his tail around me tightly when I had nightmares. He said he liked me the most. I said me too. I thought we were just two ordinary little goblins and would live like this simply. Until one day, A beautiful girl wearing a naza shirt led the white-haired cool sister and said that he is my teacher and cool sister is my junior sister. A blue Christmas tree says he is my master A young man in red clothes riding on a Hot Wheels descended from the sky and hugged me, with a heavy sadness in his eyes. Me: "?" Xiaohei: "???" No, brother, who are you?