Grotesque Romance-Hen

Story Line
Ruhige Lorelei just moved to Hinamizawa and on her first day of school, she meets Masahiko 'Tatsu' Tatsuya. To Lorelei, it's love at first sight. At first, her crush is innocent. She doodles his name in her notebook, writes about him in her diary. But slowly, she develops more and more into a stalker. She takes a pencil that he lends to her, an eraser he dropped, anything she can get her hands on with his DNA on it. And as her "crush" grows, she develops a hatred for Ayane. Ayane has been friends with Tatsu since their childhood and has a major (and normal) crush on him. Tatsu likes her back and when they start dating, Lorelei snaps. She stalked him, watching him from the bushes. For a while she believes they were meant for each other. She also notices that he pet a stray cat while walking around one day, and now thinks he is a "cat lover". One day, she decides she needs to get rid of Ayane. Lorelei manages to trick Ayane into coming over, where she kills her. After hiding the body temporarily, she goes out around the neighborhood and decapitates several cats. After she does this, she puts Ayane and several cat heads in a package and gives them to Tatsu one night at his house. While he is in shock over this, she kills him and puts his head in a box for herself to keep forever and runs off. Lorelei is never found.