Toaru Majutsu no Heavy na Zashiki-Warashi ga Kantan na Satsujinki no Konkatsu Jijō (2015)
Start year: 2015
Issues in volume: 2
Proper Japanese Title: とある魔術のへヴィーな座敷童が簡単な殺人妃の婚活事情Originally serialized in Monthly Shonen Gangan.Serves as a crossover of the different works by Kazuma Kamachi.