One day, Reimu and Marisa were taking a stroll through the forest when they came across a peculiar sight. A group of yukkuris were taking turns headbutting something hanging from a tree branch. Upon inspection, it was the grossly disfigured body of a girl. Her stomach was missing and her flesh was still warm. It looked like a brutal murder. Braving the scene, Marisa began to rifle through the girls pockets, always on the hunt for precious things. However, instead of any money or jewelry, all she found was a small book. A diary? How lame, lamented the witch, as she tossed it to the ground.