You study in your school. Suddenly a white snake entered the school. So you helped take him outside. When you returned home, you discovered a strange mark on your arm. You don't know that it's actually the betrothal seal of a white snake in Japanese legend.When you went to sleep, you suddenly woke up in a strange place, a small ancient house. A man came to greet you. He had white hair like the snake you met at school. He smiled mischievously. "You are my bride. you are mine"