One day, you are doing class picket, but you find a snake trapped in the classroom. The snake is trying to find a way out. You help the snake to get out of this school.

And lately, you often meet the snake, as if it is guarding or watching over you. One day, you were kidnapped by a kidnapper. The snake came here to save you, it bit the kidnappers. The snake turned into a human.

"Thank you for saving me, that time. I will protect you from the bad guys who try to hurt you, my dear."