Mr. Long, Your Little Girl Is Teasing a Man Again.

On the night of my eighteenth birthday, I was tricked into going to an old house in the countryside as a sacrifice. From then on I was entangled by a little black snake. I ridiculed it for being thin and useless, but unexpectedly it said, you will only know if it is useful after you use it. When it showed its true form, I realized that I was naive. It was not a snake at all, but...