Today is Barry's first day on their new job.  He made sure his uniform looked neat and his maroon fur was well kept. He has his named tag on him which also had their pronouns he/they.  Also on their uniform they are wearing the nonbinary flag pin.
"Name Tag, check!" Barry thought to himself as he waited outside the office for his boss. "Hair, check! Fur, check!". His hair was a bit disheveled but he knew his boss wouldn't mind if it wasn't perfect. Since he is a jolly friendly guy but Barry has always been a bit of a perfectionist. The young quokka was ready for his job working on The Mirage Express, a party train that serves it's passenger's needs. 
Barry meets up with the conductor who is a dog in his 60s. He was a green uniform and his fur is cyan and his muzzle is white. He looks like a good-natured old man.
"Welcome aboard Mr. Barry!" He said while giving out a warm smile, "I am your conductor! Welcome to your first day on the job." The old dog greets him. Out of nowhere a robot hand greets Barry. This took him by surprised but he was happy to the learn the robot was their to assist him if he needed it.
The conductor trains him on everything he needs to know. Meanwhile their guest enters the train one by one. They were....an interesting bunch. The quokka sees Rouge, Blaze, Tails, Vector, Shadow, Espio, Knuckles, Amy  and other aboarding the train. The one who really caught his eye was the world renowned hero, Sonic The Hedgehog! 
Barry was trying their hardest not freakout as the famous celebrity was only 5ft away from him.  They remember there was a time where everyone thought Sonic was dead. They had an opportunity to join the fight and work with the resistance. But they didn't, they were never that much of a fighter to begin with.
Barry and the Conductor went around collecting everyone's tickets. Barry meets the sonic cast one by one. "They're a bunch of hotties!" Barry thought to themselves. All of them were wearing interesting costumes. It was revealed by Amy what they are, Tails a detective, Knuckles a cowboy, Sonic a ship captain, Shadow a locksmith, Vector a butcher, Espio a poet, Blaze a titan of Industry, and Rouge a business tycoon. And lastly Amy herself was a Jouralist reporter.
"Oh hey, they are playing a game!" Barry realized.  
Amy explains they are playing a murder mystery game to everyone and she has given them roles. Barry liked their outfits and not really paying attention to the rules of the game. He was distracted by the others.
Shadow and Barry both have their eyes fixated on the beautiful Rouge. She was wearing a fancy outfit that shows off her cleavage. Barry looks aways from the sexy bat lady and tries to focus on their work.
After Amy explains the rules of the game she turns towards Barry. "Hey did you get all that?" The pink hedgehog asked. Barry started to become nervous. "Uuuuh yeah sure!"
"Great, everyone to your stations!" Amy said excitedly.
Everyone else going to their respective posts, Amy and Tails talk to the quokka at the Dining Car, since they need to wait for an hour before the game starts. As they await the beginning of the mystery, Amy and Tails share the lore and backstory of their characters.
The three have a causal conversation until the Train starts to accelerate. The three start to lose their balance. "HOLD ON TO SOMETHING!" Tails says. As the train moves faster they went flying and landing in another room. The three were knocked out cold.
***
Sometime later Barry and Tails regained consciousness. The two see Amy is already awake. Barry realizes they are stuck in the dining car closet. A heavy shelf blocks the door out, leaving the three trapped. The fox asks the pink hedgehog to destroy this obstacle with her Piko Piko Hammer, but she is reluctant to do so, instead proposing to find another way. 
Tails finds that a little weird and feels Amy is hiding something. The fox and the quokka team up and find clues. They did end up finding them and realized Amy already tried to escape using her brute strength by using her weapon. But the hammer broke in the process. 
"Welp I guess were stuck in here," Amy says sighing. "I mean seriously that shelf wont move and it's pretty sturdy, I mean who made this thing, dwarfs?" She said jokingly but still a little annoyed.
"I guess we just have to sit in this closet until someone find us," Tails suggest.
"Yeah...I guess that's our only course of action right now," Amy said feeling defeated.
As the hours go by, the trio becomes bored and restless. 
"So, do you guys want to play a game or something?" Barry asked bored.
Amy started to get an idea, she looked at Tails with a smirked, giving him the bedroom eyes. "Oh, I can think of something, " She said seductively.
"Heh, are you sure Amy? I mean I thought this was saved after the party!" Tails smirked also giving her the bedroom eyes..
"Well...I might be able to persuade you to play with me Tails!" Amy replied coyly.
"Well then I'm definitely in!" Tails said.
***
As the two are getting closer and closer, Barry looks at them getting confused. All of sudden Amy and Tails, shocking Barry. He thought they were just playing a game together, but it seems they are actually making out. Tails and Amy are kissing passionately, with their hands on each other's bodies.
Both are panting heavily, and moaning. The two have locked lips and tongues.
"Mmmm...ahhh..." Amy moaned as she felt Tails' tongue against hers.
Barry was blushing madly, he has no idea what's going on. He just watches the fox and the hedgehog make out in front of him.  "Are...are you two a couple?" They asked.
"No, Tails and I are just having some fun!" Amy replied.
"Really?" Barry asked confused.
"Yup, we're just messing around!" Amy replied.
Barry was starting to get scared and embarrassed. "I don't want to intrude."
"Nonsense, it's just a game. Let's play! Oh my god Tails you taste so good!" Amy exclaimed.
The two continued their game of "make out" as they kiss and touch each other more.
Barry just looked at them not knowing what to do in situation. Tails groped Amy's breast  which made her moan a bit. Barry's face got even redder.
Amy moans into Tails' mouth. "Mm...you feel so good Tails!"
The two continue to kiss and rub each others body. "Oooh yeah Tails..."
"Damn, Amy I didn't expect you to get horny this early. I guess you couldn't wait for your birthday orgy?" Tails said.
"Oh shut up Tails." Amy replied little embarrassed
"Ahaha alright then," Tails said as he pushed his member inside Amy.
She gasped as his cock, Amy gently rubs his shaft as tails proceeds to suck on her right breast. Barry is embarrassed looking at them but the two seem to enjoy themselves.
They continue to make out, they undress each other as their clothes fall on the floor. They strip each other down and continue their game.
Amy gets on her knees and starts to blow the fox. She sucks his cock expertly, slurping up his cock as she goes deeper and deeper. Her tongue reaches the base of his shaft as she keeps sucking on his cock.
Barry felt jealous watching him. He wished he could try to have sex with Amy, but he knows it will never happen.
The two stop and look at the quokka. "You know, you could join us? You know make it a  threeway," Amy suggested.
Barry didn't know what to say or do. They were only just a virgin, sure they watched porn. But they were not sure how to start.
"I can really tell your liking the show!" Amy says, point at his hard crotch.
Barry blushed and tried to hide his erection. "I-I-I-I-I-I-I-I'm sorry!"
"No need to be sorry! We can take care of that for you!" Tails says.
The fox and the hedgehog walk towards the quokka. Amy was behind him and Tails was in front. Before they knew Tails starts blowing Barry while Amy starts to rim their asshole. Barry was starting to feel uncomfortable and embarrassed as they were doing what he thought would never happen. He just stood there and let them do whatever they want.
Tails licks Barry's balls taking one of them into his mouth and sucks the other one. As he continues to blow him Barry feels the fox's wet warm tongue go back to lick every inch of his shaft. At the same time his ass was being invaded by the pink hedgehog girl. He can feel her warm tongue travel inside of his ass.
He groans loudly, as Amy's tongue goes deeper and deeper in his ass. He is surprised to feel his cock getting harder, he was enjoying this too much.
"Ooooh yeah Tails! Suck that big juicy cock!" Amy said.
Tails goes all on Barry's dick, lick and swallowing the precum that drips from the quokka's cock. Amy goes back to eating Barry's asshole, causing the quokka to moan louder.
"Mmm...oh god...I'm gonna cum!" Barry yelled.
Tails stops blowing him and starts to jack him off fast. Amy continues rimming him, trying to get him to finish quickly.
Barry groans and screams as his load shoots all over Tails' face. Some of it landing in Tails' mouth. The fox swallows it all, licking Barry's cock clean. Amy continues eating Barry's asshole, making him moan louder.
As Barry finishes Amy pulls out of his ass. "So...how was your first blow job?" Amy asked with a smirk.
"Wow it wasn't anything like I imagined it to be," Barry admitted.
"It's because you've never been with anyone before, well except for your hand, and that doesn't count," Amy teased.
"I...need to lay down..." Barry said feeling exhausted.
The two helped him moved to the corner of the room . Amy sat next to him, and Tails laid on top of him. "Thank you for letting us play with you." Tails said kissing them on the lips.
"Alright, so I am glad you enjoyed your first blowjob! We'll let you rest for now, Tails why don't we continue on game?!" Amy said.
Amy and Tails went on the other side of the small closet and proceed to fuck again. Tails and Amy proceed to fuck each other in the 69 position. As they are pleasuring each other, Barry lays there watching have sex. 
Amy moans around Tails' dick as she feels his tongue pleasure her. Barry is about to pass out when he sees Tails' tongue exploring her pussy. His own cock got hard from seeing Amy's performance.
Barry shakes his head and tries to sleep. He closes his eyes and remembers he was in the closet with two people he barely know. Both were naked and fucking each other, he had never seen such a thing before. It's almost as if he was hypnotized.
"Ohhh that was so good!" Amy said as she came all over Tails' face.
Tails takes a minute to catch his breath as he cums on Amy's face. "That was amazing, thank you Amy!"
"Let's...keep going!" Amy said panting.
The two continue to do their best. As Amy is licking Tails' shaft, Barry is about to pass out. "Oh, I'm gonna cum!" He yells.
Amy was shocked, but she catches his load and swallows it whole. As she continues to lick his shaft, Barry passes out.
The two continue fucking even after Barry woke up. "Hey, uhhh...what happened?" He asked still seeing the two fucking each other's brains out.
"Oh hey, you're wake!" Amy said looking at him.
"How long was I out for?" Barry asked.
"About an hour, I think?" Tails replied.
"AND YOU TWO ARE STILL GOING AT IT?" Barry said surpised.
"Yeah, it's called having stamina." She said.
"Still no one has come for us?" Barry asked confused.
"Not yet, we got carried away, plus you were passed out," Amy said.
"Well, I guess now  I'm gonna help you guys out, to atleast pass the time." Barry said standing up.
"Ooooh ready for round 2 I see," Amy replied excitedly.
Barry stands up takes off his uniform. He and walks towards the two. His cock is rock hard and ready to go. He kneels down in front of Amy and Tails and starts to lick the fox's shaft.
"Oh, returning the favor I see!" Tails said with a seductive voice.
Barry slurps on Tails' cock, tasting the fox's pre-cum. Amy goes down to her knees and starts to eat Tails' asshole,  and licking his balls from behind. Her tongue goes in and out of the fox's hole, Amy moans from eating his asshole.
Barry's mouth goes up and down on his length. Barry's tongue massages Tails' sensitive cock head.
Amy moans as she eats Tails' asshole. "Ugh...that feels great Tails!"
"Yeah...you both are great...KEEP IT UP!" Tails groans. Amy stands up still behind as she turns his head and they proceed to tongue kiss.
Barry moans as he feels Tails' cock throbbing in his mouth. He continues to suck on the fox's shaft and slurps on it, taking as much of it into his throat as possible. The more he does it the harder Tails' cock gets.
Amy kisses Tails' neck, rubbing her breasts against his back. Barry moans as he continues to suck on Tails' cock. As the pink hedgehog kisses on the fox's neck it did increases Tails' stimulation. As he felt himself getting close.
"Ahh, I'm gonna cum!" Tails yelled. 
The fox starts to thrust his hips back and forth, making Barry gag on his cock. He continues sucking on the fox's cock, they feel Tails' cock twitch inside of their mouth. Then suddenly Tails shoots his load in the quokka's mouth.
Tails moans from the sensation, shooting more ropes of hot cum into Barry's mouth. The quokka swallows more and more of the fox's seed until he can't handle anymore. Amy get's down and tongue kisses Barry. Their tongue's wrestling with each other as Barry shares the fox cum in his mouth with the pink hedgehog.
"MMM...YUMMY!" Amy moaned as she swallowed the hot load.
As Barry eats the sperm that was already in his mouth, Amy starts to lick up Tails' shaft and balls.
"Wow Barry you really give our two-tailed friend here a good time." Amy say laying on the floor and opening her legs. "Why don't you show me a good time too?" Amy spreads her pussy lips giving him the bedroom eyes.
Barry crawls towards her and proceeds to stick his tongue in her pussy. Amy feels the quokka's wet warm tell enter her cunt as he starts to eat her out.
"Oh my god that's it...like that...uhh uh...uahhhhh!" Amy moans.
Barry licks Amy's clit as he continues to eat her out. He licks it a little bit faster, making the hedgehog moan in pleasure. As Barry proceeds to make out with her cunt, Tails comes from behind Barry and spreads his ass cheeks.
Tails starts to lick Barry's ass, while Barry sticks his tongue deep inside of Amy's pussy. Amy moans and squirms from the pleasure.
Barry can feel Amy's pussy getting wetter. While at the same time he can feel Tails' wet warm tongue entering his ass. He groans as Tails tongue starts to explore his insides.
"Ooohh...Barry you are so good...keep going...ohhh yes...right there!" Amy moans.
Barry moans as he starts to finger her. "Your ass taste so good!" Tails said.
"Oooooh yeah...just like that...OHHHH..." Barry moans. "Yes...fuck me...yes...eat my ass...ahh...YES!"
Barry starts to buck their  hips as they feels Tails' tongue exploring every inch of their ass. Tails then pulls out his tongue, a string of saliva connected to the quokka's ass to his tongue.
The fox boy starts to finger Barry. Penetrating his ass with his index and middle finger. "Gah!" Barry groans. "Fuck!"
Tails keeps fingering Barry while he continues to eat out Amy's pussy. After a few minutes, Tails stops fingering Barry. "You wanna try something different?" He asks.
"What do you mean?" Barry asks.
Tails just smirks as he grabs his cock and aims it at Barry's asshole. His cock penetrates Barry's ass. Barry feels Tails' cock inside his ass. "AHHHHHHH!" Barry yells. "FUCK YESSS!!"
Tails starts to thrust his cock inside Barry's ass. Each thrust makes Barry grunt and moan. 
"Ahh...ahh...yeah...THAT'S IT! FUCK ME! UGH!" Barry moans.
Tails continues to pound Barry's ass. "FUCK YOUR ASS IS SO TIGHT!" Tails yells.
"Oh fuck yeah! Fuuuuck!" Barry moans.
Amy notices the quokka is getting too distracted by getting fucked by Tails. Amy grabs Barry head and forced him to eat her out again. 
The three was lost in lust, as they continued to fuck each other's brains out. Tails giving Barry Anal, and Amy forcing Barry to eat her out.
The quokka's ass gets so sore from being pounded. Barry was about to cum from getting fucked so hard. Amy could feel herself getting close to cumming.
"Here it comes! " Amy says.
Tails continues to pound Barry's ass, Barry couldn't hold back any longer. "OH FUCK! HERE IT COMES!" Barry yells, reaching his climax.
His cum shot out of his cock, hitting the floor below him . Amy moans finally cumming and squirting all over Barry's face.
Barry looks down and sees Tails' cock erupting with cum, shooting ropes of hot cum inside their ass. Tails orgasms and collapses on Barry's back, still inside his ass.
"Holy shit! What the heck just happened?" Barry asked.
"We had anal sex, and I came on your face." Amy said.
Barry looked down, seeing their face covered in Amy's juices. They touches their face, feeling himself getting sticky. "I...still...wanna keep going!" Barry says panting for air.
"Oh I am starting to like you!" Amy says.
The hedgehog, fox, and quokka continue to fuck some more in different threesome positions. After an hour or so, they stop and lay down exhausted.
"Best...first day...EVER!" Barry said exhaused.
***
All of sudden they hear knocking at the door. "Hello is anyone in there?" It was a muffled familiar voice.
They all get up, "Knuckles is that you?" Tails asked. 
"Yeah, are you guys alright? We've been looking for you everywhere!" Knuckles said trying to open the door
"Yeah we're just trapped in here and we can't  get ou-." Tails was suddenly interrupted by Amy as she moves the Shelf out of the way doorway effortlessly. 
"What the-" Tails was stunned by what he saw. "Amy, you said you couldn't move it!"
"Hehehe, yeah well I just wanted to have some with you two!" She said with a cute smile.
"You're such a slut Amy," Tails said laughing
Amy opens the door and Knuckles sees the three naked and covered with cum. The entire closet smelled of sex.
Knuckle's eyes widen when he saw them. "Oh my god! You guys, what happened?!" He says.
"We...we just...got carried away." Amy says.
Knuckles puts his hand to his mouth. "Geez, seems like you guys have fun, and I can't wait for my when that birthday orgy happens, heh."
Tails, Amy, and Barry leave the closet. "Hey Barry is there any showers on the train?" Tails asked.
Barry shakes his head, "Yeah just follow me!" The trio proceeded through the train heading towards the engine room.
It wasn't long before they arrived at the bathroom and clean themselves up. They all get dressed and head back towards the main room.
"Alright, we should continue on with the game." Amy says and turns towards Barry. "Hey, thank you for playing us," She kisses Barry on the cheek making them blush.
"Uh, yeah...no problem!" Barry said feeling flustered. "I can't believe I lost my virginity, the same day I got this job. What even is today?"
The murder mystery game resume as it normal does, everyone starts to play. Tails being the detective, tries to figure out who murder Sonic with Barry as his sidekick.