Spiral
Volume 5

Ayumu Narumi, a contemplative freshman at high school, finds his life changed when he is blamed for a girl's fall from a school building. Using only keen observation and his stunning talent for deductive logic, he soons figures out the truth behind the incident and clears himself, to the amazement of his Police detective sister and Kiyono Yuizaki, the enterprising Journalism Club president. That case proves to be the start of a strange rash of crimes that Ayumu learns is the doing of the mysterious Blade Children.