You were a student at a "normal" high school. One day, you accidentaly left your phone at school. The next day, you went to school early to find it. When you went in your classroom, you were met with an unexpected sight. A person you've never seen in the school before, holding your phone and erasing the drawings and scribbles on your table. You just stood there before he turned his head to look at you. You could see his fangs. Once you tried to move closer, he panicked and rushed out.