Title: Dipper's Birthday Surprise
Fandom/X-Over: Gravity Falls
Character/Pairing: Dipper Pines x Pacifica Northwest
Bondage Level: Light-Medium
Equipment Used: Bunny costume, Ball gag, rope, handcuffs, massage oil
Extra Actions: Deep Kiss, groping, massage, deepthroat
Sex Type: Vaginal
Sex Position: Missionary

A request from boygenius2020 - Today is Dipper's (and Mabel's) birthday, and Pacifica wants to give him a special birthday present as a thank you for helping her with her relationship with her parents.

"HAPPY BIRTHDAY, DIPPER AND MABEL!"

In the Mystery Shack of Gravity Falls, Oregon. There was a celebration for a pair of twins.

One was a male with short, brown hair and brown eyes with a slim build, dressed in a red and green flannel shirt under a white t-shirt, blue jeans and brown boots.

The other was female with long, brown hair held by a pink headband and brown eyes. She had a slim and chubby build with wide hips and thighs, a bouncy butt and a pair of D-cup sized breasts. She had on a pink sweater, blue jeans and trainers.

"Aw, thanks guys!" Dipper said.

"YEah, this is one fantabulous birthday!" Mabel spoke in a happy tone.

"Hey, don't worry about it dudes. You spent the summer in this place, it's like home to ya!" A fat man in his 30s said, dressed in a simple green t-shirt and grey shorts.

"Thanks, Soos. The cake looks amazing." Mabel said as she nearly went to dive onto it.

"Hold it, Mabel. I think some friends want to catch up." Dipper said as he pointed to a slim Chinese girl and a girl with the build of a bodybuilder.

"Candy! Grenda!" She said with a smile as she went over to her two friends.

As the three crazy girls caught up, Dipper hung back with a smile.

"Well, well, well. The big 18." A grizzly voice said. Turning around, he saw a grizzled man in his 60s dressed in a white t-shirt under a leather jacket, black jeans and boots with a pair of glasses on his eyes and a golden chain around his neck.

Next to him was a man who was the same as him, with a slimmer build in a brown trench coat under a red shirt, brown pants and boots with black gloves on his hands.

"Grunkle Stan! Grunkle Ford!" He said as he hugged the elder gentlemen.

"Hey, Dipper. Enjoying your birthday?" Ford asked with a smile.

"Yeah. It's good to be back in Gravity Falls. Especially for our birthday." He said with a grin.

"Yeah. Just think about it kid. You're an adult. All the freedoms that come with it. Boozing, partying and being able to have fun with the girl of your dreams!" Stan said with a flourish of his arms.

"Grunkle Stan, the last time you said that, I was nearly mauled by Mabel and her friends." Dipper said with a deadpan tone.

"Yeah…but you get my point. You got more freedoms now you're an adult." Stan said.

"And more responsibilities. Don't go around hitting on any girl that catches your eyes. That earns you a pepper spray to the face.' He then glared at Stan 'Someone can relate"

"For the last time, I WASN'T HITTING ON HER! She just overreacted!" He said with a grumble.

"That's a story for another time." Dipper asked but he looked around for someone, sighing.

"Guess she didn't come." He lamented.

"Who, Pacifica?" Turning around was a woman aged 25, with long red hair and brown eyes, dressed in a green flannel shirt, grey pants and boots with a toned, muscular yet curvy figure, strong arms and a pair of C-cup sized breasts on her chest.

"Wendy!"

"Hey, Dip." She said, hi-fiving the now man.

"How's things?" He asked

"Boring. Though' she then smirked 'I noticed you were looking for a certain someone."

Dipper blushed.

"Yeah…Where is she?" He asked.

Wendy's grin turned naughty.

"She said your present is up in your old room. You know, the one where you and Mabel stayed over."

Dipper raised an eyebrow.

"OK? So, should I just…?"

"Go ahead." She said.

As Dipper went upstairs, most of his friends looked at each other with cheeky grins.

"Uhhh…why are you smirking?" Mabel asked in a curious tone.

Wendy went over to whisper into her ear, making her eyes widened.

"Ohhh…' She then chuckled. 'He will be surprised."

Making the way up the stairs, he came across the room where he and Mabel stayed back when they were kids.

Touching the door, he smiled in nostalgia.

"Man…so many good memories…" He said as he opened the door.

"Hey, Pacific-AHHH!" he said as he reared back in shock.

Laying on his old bed was an 18-year-old girl with long pale blonde hair and blue eyes. She was beautiful with a curvy body, a tight ass, toned thighs and a pair of large D-cup sized breasts. To Dipper's surprise, she was wearing a black one piece leotard, barely covering her breasts, white cuffs, tights and black heels. Onher head, was a pair of white bunny ears on a headband.

"Hi Dipper…" She said with bedroom eyes.

"Wh-wh-WHAT THE HELL?!' he then realised something. 'Wendy!"

"Yeah…She helped with getting my gift to you ready." She said, approaching him with a sway of her hips.

Dipper then saw what was on the bed and blushed as he saw the rope, ballgag, handcuffs and massage oil on the bed

"So…why…?" he asked.

"It's your birthday. And…' She then blushed as she rubbed her arm in a shy manner. 'I never got a chance to thank you for helping me with your parents."

"Really?"

"YEah…Then the whole thing with Bill and Weirdmageddon? Things went insane for my family and well…"

Dipper then placed a finger on her lips.

"Yeah, I get it. And honestly, I've been wanting to see you for a while."

"Really?"

"Yeah, honestly…I've been wanting to see you after some time. Never got a chance to…" he said.

"Well, I can give you something for you first." Pacifica said as she closed the gap, kissing him deeply on the lips. Dipper returned the kiss, grabbing her ass as he pulled her closer.

They soon wrestled for dominance as they went to the bed, as they still made out.

Dipper was on the bed as they still made out.

"So…you wanted to try some things out?" He asked with a smirk.

"I got curious."

"Yeah, I did a bit of research. How's about we start things simple?" He said as he grabbed the handcuffs. Holding her hands out, Dipper slapped the cuffs on her wrists, securing them in front of her.

Pacifica took a hold of the belt, undoing it before she pulled it down with his boxers coming down with them.

She started to rub his cock, with Dipper shuddering at her touch.

"Oh? Big boy feeling frisky?" She teased as the cock hardened. Soon as it was fully erect, she then leaned forward to place the cock deep into her mouth, deepthroating it as she began to suck the cock like a lolly.

Dipper sighed in bliss as Pacifica deepthroated him, gripping the sheets as he was given a blowjob from the bombshell blonde that was in the bunny suit.

Moving back, Pacifical breathed out in bliss as she wiped her lips.

"Enjoy that, big boy?" She asked with a smirk.

"Yeah…" He said.

"Well, how's about we do the next level with the ropes and gag?"

"Sure. But let's keep things on the down low. Don't want the people downstairs to hear."

"Yeah. You can use the massage oil to get a great slip and to massage my skin."

"OK."

Soon, PAcifica was lying on the bed and her cuffed wrists placed above her head. Dipper tied the rope in the center of the cuffs, securing it to the headstand of the bed before placing the gag into her mouth.

Rubbing the massage oil in his hands, he positioned himself on her hips, giving a good massage on them as he moved part of the suit away to get proper access to her clit.

With one thrust, he inserted into her, making the girl moan in bliss. Keeping a grip, he soon began to pump into her, massaging her thighs as he did.

With each thrust, Pacifica moaned as she felt her breasts bounce as he continued to thrust. His hands then snaked their way to her breasts, groping and massaging them as she continued to moan as she was fucked.

As she was continued to be fucked, Dipper panted as he continued the momentum.

"It's official. I AM A MAN! IN YOUR FACE MANATAURS!" He thought to himself

Soon he pumped faster as he groped her breasts.

"Oh yeah! OH YEAH!" Dipper howled as he soon shot into her clit like a water pistol.

When the cumming slowed down, he managed to take out his dick and took out the gag in her mouth, allowing her to breathe.

"So…how do you like your birthday present?" She panted.

"Best. Birthday. Ever!" He said.

Meanwhile, downstairs.

"HERE'S TO DIPPER!" Stan cheered as they raised their glasses.

They heard everything. And they couldn't be prouder.