A Certain Magical Index (light novel) - A Certain Magical Index, Vol. 4 (light novel)

A certain unlikely hero...Touma Kamijou has gotten permission to leave Academy City and goes on a beach vacation with his family. But somehow no one is who he remembers--and a certain magical spell is to blame for everything! Touma finds himself swept up in the mysterious Angel Fall spell in the latest volume of the smash-hit light novel series!