http://www.dlsite.com/maniax/work/=/product_id/RJ188044
After skipping class on the rooftop the protagonist is coming back down the hall when he hears strange sounds emanating from an empty room.
He looks in, and sees a female student in a shocking scene.
He turns and starts to run.
But he thinks twice and goes back to look once more.
Only to see, the female student exiting the empty room… as if nothing had happened.
Did he see a lucid daydream?
No, it was certainly a real experience, he thought.
From there, weird happenings began…
Students and teachers disappearing one by one.
Bizarre stains starting to appear here and there on the walls.
The school finally consumed by dark derangement.
There, a world abominations roam… abominations that are, the barely recognizable, transformed and disfigured remnants of his once were …classmates and teachers.
Crazed, like beasts, only answering to their primal urges…
They attack and ravage… and assimilate to the world.

Release: 2016/11/30
File type: exe
Genre: ADV, 3D, lolicon, oral, rape, gangbang, violation, horror, teacher, school uniform
Language: japanese
Interface: japanese
Censorship: yes
Size: 617 MB