Chain

A mysterious person who appears out of nowhere after each murder occurs. Apparently he is in the same school as the ******e, but in a special class. Everyone in that class barely appears at school so she has never seen him before. Later it is discovered that he lives one street further away from the ******e.

He does not speak much but when he does, it is only for important matters or blunt comments. His appearance and glance give a cold vibrance that makes an average person tremble. Since he is a mysterious person, it makes the ******e wonder if he has something to do with the murders.