Toaru Majutsu no Heavy na Zashiki Warashi ga Kantan na Satsujinki no Konkatsu Jijou

A spin-off of the various works of Kamachi Kazuma. One day, Kamijou Touma (A Certain Magical Index) faced yet another misfortune. His toilet was broken and spraying water everywhere. As he was lamenting his misfortune, suddenly he appeared in a strange place along with Index and Misaka. Soon enough, more strange people begin appearing...

Includes:

A Certain Magical Index
Heavy Object
The Zashiki Warashi of Intellectual Village
The Circumstances Leading to Waltraute's Marriage
A Simple Survey
A Simple Monitoring