Toaru Majutsu no Heavy na Zashiki-warashi ga Kantan na Satsujinki no Konkatsu Jijou

Toaru Majutsu no Hevi Zashiki-warashi ga Kantan na Satsujinhi no Konkatsu Jijou (とある魔術のへヴィー座敷童が簡単な殺人妃の婚活事情) is an upcoming crossover light novel by Kamachi Kazuma featuring characters of all of his novel series including Toaru Majutsu no Index. It was announced as part of the Kamachi Kazuma 10th Year Anniversary Celebration. More details will be released on the Winter 2014 issue of the special Kamachi Kazuma Magazine to be published by Dengeki Bunko Magazine.