The Circumstances Leading to a Simple Killer Princess's Marriage Was A Certain Magical Heavy Zashiki Warashi

Also known as: とある魔術のヘヴィーな座敷童が簡単な殺人妃の婚活事情 · Toaru Majutsu no Heavy na Zashiki Warashi ga Kantan na Satsujinki no Konkatsu Jijou