Ok, the headmaster saved the blond guy in order to get his head.
What I understood, he has changed other parts of his body with part of students bodies.
Azuma decided he didn't want lose his head so he changed his medicine and the headmaster medicine.
In chapter 5 page 26 he wake up
In page 27 we can see that he dress like one of the doctors and have a false head in that liquid, he give it to another doctor. Most probably he knock out the doctor we can see in page 26 and took his clothes.
Because they already had the head, they cut the headmaster head but realized too late that the head was false.
We can see a BEEEEP in page 27, this means that the headmaster body died.
So now Azuma took his place of the headmaster and the few people that knew the true accepted in order to keep him quiet about all the experiments the headmaster have done with his students!
Oh wow
I, uh, did not expect that
Thank you
Can anyone tell me a run down of what happened?