Bloody Chainsaw Girl (2016)

Giko Nokomura is a care-free middle school girl. She struggles to kill mutant zombies who were her classmates at first, but luckily she has a chainsaw and knows how to use it. At first, she just wanted to end the school year successfully, but things do not turn out that way. It is time to confront the baddies. The school grounds are a battle zone.