This probably isn't my best work, but I couldn't come up with a ton of ideas for this one. Anyway sorry for the long wait and enjoy!

Star POV

I awoke to sunlight creeping through my window. There's nothing better than warm sunlight on a Saturday morning! I rub my eyes and get out of bed. In a few minutes, I'm in dressed in my normal attire. A blue dress with puffy shoulders and a white collar, blue slippers and white leggings to match the dress, and a ponytail tied up with a large red bow.

"Perfect!" I say as I finish tying the bow. I grab my wand and make my way downstairs. As I get to the bottom step, I'm starteled by Mr and Mrs Diaz in the front room. "Surprise! Happy 47th day on Earth Star!" They cheer in unison. Mr. Diaz holds a cake in his hand, Mrs. Diaz has a paper, and Marco stands nearby with a small wrapped box.

"Oh my goodness! You guys did all this for me? I can't bealive it!"

"Yeah it's not like we've done it everyday since you've gotten here or anything. Oh wait, yeah we have." Marco says sarcastically.

"I made you a cake!" Mr Diaz says as he shows me the cake. It has a frosting portrait of me on the top.

"That's so sweet of you Mr. Diaz!"

"Please, you can call us your Earth parents!" Mrs Diaz says with a wide smile.

I smile back at her and hug her. "Thank you. It's been hard being away from my family, but you've helped me by filling in!" I say as I tear up a bit.

"Well we love our little Estella! I even wrote you a poem!" She breaks the hug and pulls out a peace of paper. "Our lives were so small and puny..."

Marco POV

"...Until this angel arrived from Mewni!"

'Oh geez, it's getting pretty sappy in here. I need an excuse to get outta here!'

Suddenly, someone knocks at the door. "Knock, knock, knock"

'Hell yeah! Thanks universe!'

I'll answer it!" I say as I scramble out of the room. I hurry to the front door and open it. On the front step stands a boy in a black, blue, and red wool cap, a black, blue, and red sweater, and black jeans. He has fingerless gloves on his hands and black climbing boots on his feet.

The boy smiles at me. "Vad är tik! It is I, Gustav!

"No way! Where the hell you been Gustav?" I ask, excited to see my old friend.

"I've been traveling Europe selling mine 'special' meatballs!" He says with a smirk. "How is my American friend Marco? Staying out of trouble?" He asks with a wink.

"I've almost been arrested 7 times in 3 months! Some things never change huh." I say chuckling.

He laughs too. "Some things never change! I've been in mine fair share of trouble lately to! I'll tell du all about det later, but first, let's say hi to your parents, ja?"

"Yeah they're over here. They'll be so hyped to see you again!" I lead him into the living room where mom is still reading her poem, and Star looks like she might cry. Yep still uncomfortably emotional in here.

"Guys, look who's here!"

Star POV

"Guys, look who's here!" I hear Marco say behind me. We all turn to see Marco standing with another boy I've never seen. Before I can say anything, Mr and Mrs Diaz run past me and hug the boy.

"Oh we've missed you so much!" Says Mrs Diaz. "Yes, what a wonderful surprise!" Mr Diaz says.

I approach them and give a small wave. "Uh hi. I'm Star."

"Hello! I'm Gustav! I'm am de Diaz's foreign exchange student from last year!"

"I'm not your first exchange student?" I ask

"Nope. That's who all these kids are." Marco says pointing to a wall lined with framed pictures of kids.

Gustav begins talking again. I've come with gifts from Scandinavia!" He sets down the olive colored bag he was carrying and opens it. "For Mrs D, a pair of clogs!" He hands her a pair of wooden shoes. "And for you Marco, the handheld game lederhosen tycoon!" He tosses the game to Marco. "Mr D gets a genuine viking helmet!" He gives a metal helmet with horns to him. Mr. Diaz puts it in and rams the wall laughing.

Gustav then turns to me. "And for you, nothing! I did not know you existed! Now follow me, I'll make you all my special meatballs!" He walks into the kitchen with everyone but me following close behind.

I frown. Something about Gustav doesn't sit well with me.

In the kitchen

Gustav made us his 'special' meatballs in the kitchen. Everyone seems to like them, but I'm to suspicious to try them. I'm to busy prodding them with a fork to notice Gustav is in the middle of a story.

"The Scandinavian monsoons were over, but the danger had just begun! The iceberg was sinking. Heedless of my own safety, I disrobed! I dove into the freezing fjord, and brought Yuri back to his mother!"

Everyone looks at him in awe. I give a disinterested look. "Meh."

"Marco have some more meatballs!" Gustav says piling a bunch onto Marco's plate. "And for you Mr. and Mrs. D, my special meatballs! He gives them a wink and dumps meatballs onto their plates.

Everyone scarfs down their food. Gustav gets up with his bowl of meatballs. He throws them all into the front room. "Go get da meatballs!" He says laughing. Mr and Mrs Diaz dart out of the room in pursuit of the meatballs.

Gustav slaps Marco's hand. "Shall vi begin?" He asks with a mischievous grin.

"Hell yeah! I've got the paint already!" Marco responds.

I raise an eyebrow. "What are you two getting into?"

Marco gives me a smirk. "We're going to tag the water tower," he says while pulling a spray can from his jacket pocket.

Well I guess I know why him and Marco like each other now. They're both bad boys. But Gustav acted so nice around Mr and Mrs Diaz!

"So is you being good just an act?" I ask Gustav.

"I guess du could say that," he says with a smirk. "I've also brought illegal fireworks!"

"No Way! Let's put them outside the police station!" Marco says excitedly. And with that, him and Gustav ran out the back door.

I feel like Gustav is hiding more than just being a bad boy, and I'm going to figure out what it is.

The Next Day

I dress in my typical attire as soon as I wake up and make my way downstairs. As I round the corner, I hear Mrs. And Mr Diaz in the front room. "Surprise!"

I smile. "Oh you guy-"

"Happy 2nd day of your visit Gustav!" I see Mr. D with a Gustav cake. Oh fantastic, I've been replaced.

"Oh Diaz family! You almost have as many surprises as me!" They hug him.

I frown and sit on the couch with my hands in my lap. When I sit down, I accidentally knock Gustav's bag off the couch. It falls to the floor, and Gustav's stuff spills. Unsurprisingly, it's all very suspicious.

Books on Scandinavian history and languages, pill bottles, passports, multiple ID cards, and a lighter. I pick up the ID's and Scandinavian books. That confirms it. Something about Gustav is seriously wrong, and possibly dangerous.

Suddenly, the items are ripped from my hands, and I look up to see Gustav. "Ha Ha Ha! Such a curious girl, Ja?" He stuffs his stuff into his bag, then gets up close to my face. "Mind your own fucking business girl." He says in a low tone through gritted teeth.

"Uh- Okay..." I say quietly.

He stands up and turns to the Diaz family. "Now let us eat cake, Ja!" Once he's busy talking to Mr. And Mrs Diaz, I grab Marco and bring him over to the couch.

"Marco something is off about Gustav!"

He rolls his eyes. "Yeah I know you don't like us getting into trouble, but we're fine."

I put my hands on his shoulders. "No there's something more dangerous about him! I found books about Scandinavia in his bag. Why would he need to learn about his own country?"

"He pulls my hands off him. "Well if you ask me, it seems like you want me to yourself," he says smirking.

"Marco listen to m-"

"Marco think fast!" Gustav yells interrupting me. He throws a meatball to Marco. He catches it and pops it into his mouth. "I could live like this forever!" He says through chewing.

I turn and look at Gustav who's glaring at me and giving a devilish grin.

I need to find out what he's up to before he does something bad!

3 days later

Ive been spying on Gustav for the past few days, and I think I've got enough evidence to make a case. I've seen him making suspicious phone calls, sharpening an axe, sprinkling something suspicious into his meatballs, and measuring Mr and Mrs Diaz while they sleep.

I've got all the photographs lined on my desk. I've been up all night trying to figure out what he can be planning. I'm to close to go to sleep now!

Someone opens the door to my dark room. It's Marco. "Hey Star-" he stops when he sees my bloodshot eyes examining the photographs I've taken. "Uh... are you ok?"

"I look towards him with tired eyes. "I've spent days spying on Gustav. He's up to something Marco! He's been sharpening his axe, making suspicious phone calls, and I saw him putting something weird in his meatballs!"

Marco doesn't speak for a few second. "You're fucking insane. We're going on a picnic with Gustav right now. You can come if you chill out."

"Where's it at?"

"Isolation Peak, where no one can hear you scream," he chuckles at that last part, then exits my room.

I sigh. Maybe I am crazy. Maybe Gustav isn't all that bad. I sit down and think about everything I've seen him do. The axe, the meatballs, the measuring. That could be normal. But... it could be bad to...

Wait, could Gustav be planning on killing them? Was the stuff in the meatballs poison? Were those measurements to know what size body bags he needed? I knew it! I knew he was bad! I've got to save them!

I run to my window and see the car pulling out of the driveway. Theyre already leaving! I dash downstairs and fling open the front door. "Bunny Rabbit Blast!" I yell as I point my wand towards the ground. I shoot through the air leaving a pink trail of clouds behind me, and land on top of the Diaz's Car.

The car goes fast enough that I almost fall off. I use my wand and make a magic rainbow seatbelt.

We drive for a few minutes before I see a fork in the road ahead. A sign points to the right and says 'Isolation Peak.' I shoot it with magic and make it point the other direction. When the car begins turning to the left, I jump off and hurry own the right path.

After a little bit of running, I come upon an opening and see Gustav standing over a campfire. In his hand is the axe I saw him sharpening before. I was right! He was planning on killing them here! I jump out of the bushes and confront him. "I know your secret Gustav!"

His eyes narrow. "You'll never take me back to da Interneringscenter!" He turns and begins sprinting through the woods.

I chase after him. "Glow worm blast! Narwhal blast!" I yell as magic worms and narwhals shoot towards Gustav. He dodges the spells and keeps running. When we come to the end of the woods, we're met by a gorge with a suspension bridge going across. Gustav hurries across then cuts the ropes with a knife. The bridge falls to the bottom of the crevice. "Ha ha! Dra åt helvete girl!" He yells

I grasp my wand. "Glitter Dragon Escalation!" A bright shiny dragon emerges from the gorge and lifts me across.

Gustav's eyes fill with fear as the dragon snaps at the ground in front of him. He begins running, but the dragon explodes and makes him stumble to the ground.

"Give it up Gustav, I know your full of lies."

He sighs and looks at the ground in defeat. "Ja, that is true."

"So you were planning on murdering the Diaz's!"

"Yes, yes... wait what?! No I wasn't going to kill them you Dum tik!"

"But... I saw you preparing everything!"

"Truth is... I'm not from Scandinavia. Name's Charlie Booth, and Ima troubled kid from Detroit, not a troubled kid from Scandinavia." He says in a completely different accent. "Ya see, back in Detroit, I got into some gang stuff and I've been running from the police for a while. I can't go back to the detention center there. I Can't!"

What about the phone calls, the axe, the meatballs!" I ask, still very suspicious of him.

"Well the guy on the phone was hooking me up with a new ID, the axe was for that fire I made back there, and the meatballs are just a little something I sell in the side for extra cash. I just need to lay low for a couple more years, then I can start fresh!"

"Well... what about measuring Mr and Mrs Diaz while they slept?"

He scratches the back of his head. "Hen heh, well..."

Before he can finish, a car pulls up next to us and honks. The windows roll down and we are greeted by the Diaz's. "Hello Star! Was a pleasant surprise!" Mr Diaz says smiling.

They get out of the car and run over to us. "You made it!" Mrs Diaz says.

"Yes I did. I have to tell you guys something about Gustav! He..." I look at Charlie. He's looking at the ground with sad eyes. "He... He made you more meatballs!"

The Diaz's start cheering and run towards the campfire. Charlie sighs with relief. "Thanks for not blowing my cover. If there is anything I can do fo ya, just tell me!"

I smile. "Well there is one thing..."

At the Diaz house the next morning

"Farewell!" I say as I wave Charlie away. Next to me is the Diaz family, who are also waving but are a bit more sincere than me. Charlie walks down the street and out of view.

"See you next year!" Marco yells

"Probably not..." I mutter to myself.

We all return inside, and I'm greeted by a wonderful sight in the front room. "Surprise! Happy 51st day on earth Star!" Mr. And Mrs Diaz say. They hand me and Marco a slice of cake.

"Sorry your favorite exchange student had to leave so soon," I say to Marco.

He smiles and puts his arm around my shoulder. "Pfft. You kidding? You're my favorite."

I smile back at him. "Thanks Marco."

"Oh I almost forgot!" He fishes into his jacket pocket and pulls out a small wrapped box. "I got this to celebrate your 47th day here, but I got distracted by Gustav." He hands it to me.

I give it a shake. "There's nothing dead in here is there?" I ask.

He laughs "Nope that was a one time thing. This is actually cool."

I eye him suspiciously before opening the box. Inside is a red headband with little devil horns on it.

"I thought you'd look cool in it," Marco says while rubbing the back of his head.

I smile and put it on. "Thanks Marco, it does look nice. Now let's enjoy this cake." For the next little while, we sit on the couch and enjoy each other's company and our cake.

If you want to see how I imagined Gustav to look like in this story, you can find a pic of it on my imgur account TheBackupPlan

Also, he may or may not make pot meatballs to make more money selling them.