--- This is a story about her killing herself. --- In this world, people known as "迷い人" (Mayoi-bito) come from another world, Japan. Due to the past rampage of a Mayoi-bito that caused a global disaster, the "処刑人" (Shokeinin) Menou has taken on the role of killing any Mayoi-bito she encounters. As she coldly and relentlessly carries out her mission, she meets her next target, a Japanese girl named Akari. Although she was supposed to have killed her as usual, the immortal girl calmly revives. In order to find a way to ensure her death, Menou embarks on a journey with her. This is a popular work that won the Grand Prize at the GA Bunko Awards, and it is the highly anticipated first volume of its comic adaptation! It also includes an original short story written by the original author, Sato Masato!