Question her

You stride towards the corridor where Luna was and you notice that she was barefoot, wandering the halls.

"Luna! Why are you out here barefoot?" you call out as you approach her.

She whirls around and looks at you in surprise "Oh, I suppose someone has taken them" she utters in a soft dreamy voice.

You frown, "People are taking your stuff again, huh?"

"Well, I suppose we'll have to change that," you say as you lead her into an abandoned classroom.

You pull out a chair from behind a desk while Luna stares at you with an inquisitive look.

You motion for her to sit down, "Take a seat, I'll teach you something so you won't have problems like this again" you declare as she skips over and settles into the chair.

You bend down and move her one of her legs out before resting the back of your hand on her foot. You move your hand back with a sharp hiss, it was icy cold. You snap a warming charm at her feet and conjure her a pair of wool socks and shoes to put on her feet.

With that, you transfigure one of the desks into an empty trunk.

"Now, the incantation is Salutuo Inpulsa, and the motions are like this," you say while showing her the motions.

"This is how you tell if you've cast it correctly," You say before casting the spell at the door and it flashes a light blue.

"It'll give someone a mild shock if they try to access your things without your permission, so give it a try."

Luna briefly hesitates and begins to slowly go through the motions, trying to memorize it.

Meanwhile, you awkwardly turn to address the empty classroom, "Hogwarts, call me a house-elf!"

You hear a small pop in front of you and a house-elf looks at you expectantly.

"What's your name?" you question it.

"Colluso, sir"

"Very well, I need you to grab me a pink tube of paste from my dorm, it should be on my bedside table," you instructed.

With that, the house-elf disappears with a small pop and quickly reappears with the tube of paste.

"Heres you go Master Potter sir"

"Good, Colluso, that will be all for now" you address the house-elf and he pops away.

By now, Luna has tried the charm twice with no success.

"Now let's give you a bit more incentive," you say while brandishing the pink tube, "every time you fail at the charm, I will apply a bit of this on your body."

"Since you've been unsuccessful twice I'll start with your tits," you add as you cast a warming charm at her and open her robes.

You squeeze a bit of the cream-colored ointment on your hand before spreading it on her breasts. She squirms a bit before gasping as her nipples suddenly stood erect.

"W-what does that do?" she shakily questions.

"It's just a stimulant" is all you give her, "now try again."

She casts the spell at the transfigured trunk but nothing happens.

"Move your arm about thirty degrees to the right when you flick your wand" you instruct her as you run her through the motions of the spell again. You also squeeze out more of the paste and spread it primarily on her nipples this time as she gives a small moan.

She goes through the spell several more times as you lather her tits and pussy with the cream.

"Again!" you commanded as she fired the spell at the trunk, causing it to fizzle as it impacted.

"Good job, you're making good progress" you compliment her as you slip your fingers inside her soaked folds.

You start coating the inside of her pussy with the paste as well and soon enough, she's covered in a layer of sweat and quivering. She grits her teeth and casts the spell again, finally making the trunk flash blue.

You give her a look of astonishment "Amazing, you managed to get this down faster than I did" you compliment her while putting away the pink tube.

"Now let's give you a reward" you groan out as you put her legs on your forearms and pick her up while swiftly sinking your cock in her sopping cunt.

You set her down on one of the empty desks and begin fondling her tits. You're thrusting in and out like a madman as she shrieks in pleasure, lost in a haze of lust. After what seemed like forever, you blast out your seed in her womb, painting it white. Luna lays there limp after her third orgasm with her tongue lolled out.

You quickly snap a contraceptive charm at her as she comes back from her post-orgasmic bliss.

"We should have another lesson soon Harry" she mutters to you in a dreamy voice.

You agreed as you pull out of her gently and casted several cleaning and modified drying charms at yourself and Luna. You called Colluso again and requested two Invigoration Draughts from the Hospital Wing.

After you and Luna both downed the potion, you undid the spell on the door and reverted the trunk back into a desk. You escorted Luna to her table in the Great Hall and as you passed by a group of girls, one of them whispered something about Luna to one of her friends causing both of them to erupt into laughter.