In a great developed city there falls a great school with the students all rich. In there a girl named Mary studied there in seventh grade. She doesn't talk much and have no friends. Mary always stays in her house and used to write and listen songs everyday.

One-day when the class was going on, a sudden earthquake appeared worst. And from the skies fall five people each with horns. They said to not make a move but Mary's teacher made a move and was killed at the point. Then one of the person with horn said, "If you all...