End of all painless nights

The story of the end of world with school theme. aliens and invisible entities. It all started in 2019 In noir grand high school it was exam time suddenly bodys of students who goes on the students started appearing In the exam halls when nobody was around but strange enough those corpses owner were still alive The victims wear not dead but thoes corpses looked so real?...How could this be..?

There was a broadcasting held on tv The speaker was invisible he/she hs great power. every one was afraid....seems like Invisible entity didn't kill the victims but the victims bully's or enemies

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The speaker" Hello human...What..am i doing here? well im here to help you restain this over populated world"