Dream About Dead Classmates And Boss Fight

Somewhere in the mountains or probably in the province (the setting is the province) old man is for some reason angry on the young woman, the locals found out that he is abusing the young woman and called the police. The police arrived and arrested the old man. They moved the young woman in a town in the province. For some reason I was there, guiding her or some sort (I was touring her throughout the school) and she was quiet, nice and kind. After the tour, we're in a classroom as I introduced her to my classmates (from my school in junior high) who will be soon her classmates as well. I said to her to have fun and start making friends or talk to each other or something before walking away, seeming to have other things to do in the school. I was going to an elevator, moving up, with a few of my classmates (in senior high this time) heading to 4th floor, the court in the school. There were a few to more people there as I talked to the teacher there while my classmates talked or walked around, playing in the court. Then my classmates leave in the court, leaving me there with the teacher. Once the teacher packed a dessert for my teacher and have it to me, I left. I then walked into the elevator pressing the button that moves down to the ground floor to my classroom, but for some reason I am stuck in the elevator for a long time until they get me out of the elevator. Once I entered the classroom, I am shocked and confused to see my classmates (back in junior high) dead, except the young woman I guide earlier isn't there. I then placed the container full of dessert into the teacher's desk and find the young woman. I then went to the kitchen to find her, but she wasn't there, so I grab myself a coffee and head out. I went to find her in many hangout spots in the school but I haven't seen her, until I found her in the school grounds or in the back of the school. I asked her where she had been and about our classmates. She went silent for a moment then told me to come with her. I was confused and curious so I agreed to come with her. She then guides me to the principal office and opened the door I was shocked to see the principal is dead with lots of blood and all, like my dead classmates. She then goes to the desk and pulled out a lot of things: earphones, armbands blue and pink, a rubber bond and a gun. I watched her pulled these out as I drank the rest of the coffee, placing the coffee cup on the side of the doorframe, feeling like I'm saving this scenario like in the games I played. She then set up, wrapping the armbands around my left forearm and taking off the rubber bond of the gun before handing it to me. I took the gun, the gun is quite light, much like a toy gun. She told me to shoot the dead principal as it had like a bad spirit within. I hesitated, I never shoot anyone before, it scared me to take a life of a human, but this human, the principal is dead, so, I'm practically shooting a dead corpse. After some hesitation, somehow I found courage or bravery or something, I shoot at the principal. Nothing has happened, I was confused, looking back at the young woman as the young woman nods, seeming to talk to someone as I heard whispers throughout the room. She then told me to shoot the dead principal in the eye, and I did, had my gun in my left hand wrapped in armbands, aiming it sideways as I shoot at the principal, the principal's pupils widened as everything turned dark, the young woman is gone then suddenly, I'm in a boss fight or some sort, shooting at the seemingly mutated principal to which is large as I shoot him continuously to death.