Kirisaki Fumio's just a highschool girl in love... ...but then she finds out that the guy she's fallen for happens to love someone else. ...so she decides to go out and get a chainsaw. And take it to school. And then many things happen. (Source: Horobi no Michi)

Saitama Chainsaw Shoujo is based on Hiroshi Sakurazaka's 2004 short story of the same title, which won 16th SF Magazine Readers Award.