Hiroki Yamaguchi

There is a schoolgirl who carries her own personal chainsaw. She was attacked by a dead body who was created by her classmate one day. As such, she does not understand why she was attacked by a classmate. To find the answer she ventures into the enemy's base. There she finds out the reason for the assault.

Giko Nokomura is a female student at Nightingale Academy, who carries around her very own chainsaw. One day she begins to be attacked by modified corpses created by one of her classmates, Nero Aoi . She tears her way through the corpses and busts into Nero’s hideout. Why is Nero so intent on attacking Giko?! The reason will shock you!After her battle with Nero, she encounters a new enemy. It’s the leader of the Nightingale Academy Student Council Guardians, Nemesis.

Giko Nokomura (Rio Uchida) is a delinquent girl and a senior in middle school. She struggles to kill zombies who were her classmates. Based on the manga series "Chimamire Sukeban Chainsaw" by Rei Mikamoto (asianwiki)

1000 years from now a young woman's life is at risk in a post-nuclear sci-fi community as she investigates who controls and operates society and the economy. As she gets close to the truth the walls start to close in on her.

Luchino is a troublemaking girl on her way up to school one morning, as normal denizens of the building join her in the elevator. But she realizes that trouble may be brewing when her unusual psychic power reveals to her that two of the men on the lift are psychotic killers, being transported to another prison level. When the power goes out, the prisoners escape, terrorizing the elevator with no way for the victims to escape. (Yahoo)