It was Willy, "the Ghost Hunter"

The girls all watched in disbelief as behind the fence in the forest clearing stood the dorkiest, most irritating nerd they've ever seen.

"Who's that?" asked Milly.

"Oh that's just William Smallsen, or Willy for short", Jenny explained, "he's a dork the same age as us who went to the same highschool but a different class."

"I may have flashed my tits to him once or twice just to tease him" added Jenny, laughing, "you should've seen the nerd's look on his face."

"Oh Jenny" responded Milly, herself and the others also laughing.

"But still, just look at him, the kid's a huge dweeb who believes aliens and ghosts are real" further added Jenny, "just ignore him."

"Willy the Geek Hunter more like it" said Stacy mockingly, inducing another laugh in all of the girls.

True to girls' descriptions, Willy was a nerd of the highest caliber. Thin, and barely standing at 5'6", he looked absolutely ridiculous in his alien-themed t-shirt and looking at the "ghost-hunting" app he developed for his phone.

"A ghost hunter, huh?" Milly thought to herself, "this might be the perfect scenario for my new powers."

"Guys, I need to run to the the bathroom real quick" said Milly.

"Kay, but hurry, we need to go to that new cafe across from here" said Jenny.

"Of course, be back real quickly!" answered Milly, running off to the park's nearby public restroom.

Entering the female part of the restroom, she entered a stall and locked herself inside. Then, she turned invisible and intangible, and exited the restroom by hopping through a wall.

She made it to the fence that separated the park from the forest and passed through it with no problem. Milly was now standing 10 feet away from her prey, Willy the geek.

She approached him, still invisible.

"Dammit! Nothing on my radar!" Willy said, frustrated.

Suddenly, he felt a touch on his left shoulder.

Willy froze.

"You've been looking for me?" whispered a sexy female voice to Willy.

"W-who's there?" said Willy, scared.

"It's me, the ghost you've been looking for" said the sexy voice.

"F-for real?!" Willy couldn't believe this.

"For real" reassured the voice, as a hand now stroked Willy's butt.

"W-who are you?" asked Willy, still scared.

"I am a girl that died at this very spot, twenty years ago" said the female voice.

At this point, Milly was trying not to lose it. This was all too hilarious. Her pretending to be a ghost and Willy's reactions all but made her burst into laughter. But she had to maintain her composure if her plan were to succeed.

"Are you p-pretty?" asked Willy, his butt still stroked by his "ghostly" acquaintance.

"Oh, very pretty" answered the invisible Milly.

Milly now stood behind Willy and hugged him, and due to her being taller than the nerd, her big tits pressed directly into the back of his head.

Willy now had an erection.

"Never been with a woman before?" asked Milly, noticing his arousal.

"N-no..." he answered sheepishly.

"Would you like to be?" she said in the sexiest tone possible, her hands now cupping his bulge from behind.

"Y-yes..." he answered, now completely ensnared by his first ever ghostly encounter.

"You'll have to summon me to this world first, and then you can have me all to yourself" she said, completely seducing him.

"How do I d-do that?" he asked, now fully hypnotized and moaning a bit from Milly's touches.

"You'll have to... perform a ritual" she answered,

"O-of course! What sort of ritual?" agreed Willy, fully willing to do anything she asked.