Seibetsu Fumei na Koroshiya-san ga Kawai Sugiru.

It's been a month since 25-year-old Tsukushi Yoi was fired from her last job. In the midst of doubts about her future, she discovers a mysterious young person sitting right in front of her house. Are they a boy? A girl? They look like an angel, but turn out to be a professional killer of indetermina