文学少女インセイン (Bungaku Shoujo Insane)

Background
This song was featured on the albums VOCAROCK collection 4 feat. 初音ミク, V♥25 -Exclamation-. It was also the title track on Karasuyasabou's the album of the same name. Parts of the song incorporate the melody of Entrance of the Gladiators, a common stock song for circuses and carnivals.