A Gryffindor and a Slytherin (Draco Malfoy x Reader)

A Duel

A few months had passed when one morning you decide to go to breakfast early. Draco is already sitting alone at the Slytherin table and you immediately run over to him. You say good morning to each other, hug, and talk for a little bit.
You see Hermione walk in the door. You run over to her and sit down next to her as Harry and Ron shortly join you.
"Harry!" Hermione looks at the door which seems as if she spotted someone she was looking for. "It's Katy Bell!"
Harry immediately stands up and walks toward Katy. Katy was the girl who Draco had cursed before Christmas. You keep an eye on their conversation and see Harry turn around and just stop. He's looking at Draco. Draco has a look of panic on his face as he walks out of the Great Hall with Harry following behind him.
"Shit! I gotta go." you say as you start running after Harry.
"What?" you can hear Ron say as you are getting up to leave.
You follow the two until they go into the boy's bathroom. Neither of them know you are here and you would like to keep it that way, so you follow Harry into the bathroom and hide behind a stall when they aren't looking. You can't hear their conversation, but you start to hear spells flying in all directions. Your trying to dodge spells when you hear Harry yell "Sectumsempra!" You recognize that spell from the potions book that Harry had, and you knew this would happen when you found the book, but you didn't want to believe it. You can hear Draco fall to the floor, sobbing. You run out from your hiding spot and run to Draco. You see what looks like bullet holes all over his body. His blood mixing with the water spilling from the broken sink that someone had hit with a spell.
"Draco!" you bend down and hold his hand and try to keep him calm.
"Harry! Harry help! Do something!" you yell desperate for help. You can see Harry coming out from behind one of the broken sinks with a look of shock on his face.
"Harry please!"
He just stands there not knowing what to do.
You look up and see someone wearing long dark robes standing over you and Draco. It's Snape. He tells Harry to leave and he does, still in shock. Snape starts muttering a spell over and over again, gliding his wand over all the holes in Draco's body, ending with the one on his hand that you are holding. All the wounds repair themselves instantly. Snape picks up Draco who is now unconscious and brings him to the hospital wing. You stand up and wipe the blood off your hands on your robes, and leave the bathroom. Harry is still outside. You walk right by him even though he asks to talk, and you don't stop walking until you get to the hospital wing to see Draco.