Sensei wo ryûzan saseru-kai

Five Japanese high school student girls band together to play pranks in and oout of school. Their leader is cold-blooded Mizuki, who kills a rabbit hurling it on the floor in an urge of cruelty. One of their teachers, the devoted Sawako, is four-months pregnant. The members of the band decide in a meeting that the teacher is impure because she had sex and decide to induce an abortion using pills stolen from the school's science lab. Based on a true story.