Props to PrussiaLivesOn for suggesting this!
Warning: Read with caution. Expect lemon. -First lemon ever written, but let's give it a go!-
--------------

"Ah!! My head hurts." Gilbert groaned in pain at the stacks of papers on the desk.

"Relax, Gilbert. It's only algebra."
Mathew replied.

Exams were coming up, and Gilbert has been barely passing the course.
He knew his parents would freak out if they found out what his grades were.
So he has to ace this exam, and it seemed like a longshot from where they're headed.

"Birdie, that is the worst reassurance I've ever gotten."

"Come on, Gil, it's not that hard. Look here. To find 'P' for Pepperoni slices, you're going to have to move all the numbers across the equal sign.
When they are across the equal sign, they are the opposite integer, like a mirror." Mathew explained for the millenniumth time.

Gilbert simply nodded, concentrating on the other's words.

"Ignore the one with the variable for now and solve 20.75 - 15. You can do it in your head."

"Uhhh 20 subtract 15 is 5, so 5.75 dollars."

"Good! Now... You are left with 5.75 = 0.25P. From there, you isolate. In otherwords, trying to get the variable in its own by dividing the number since it is the opposite form."

"So... 5.75/0.25?" Gilbert asked, making sure.

"Yes. When you calculate that, how many pepperoni slices did the guy order?"

"23."

"You did it Gil!" Mathew smiled.

"Ooh, I think I finally get it. Thanks, Birdie!" Gilbert said.

He began to work his way through each equation, and Mathew had focused on studying for science.
It wasn't his forté in the very least.

"I'm so bored..." Gilbert mumbled, seeing more stacks of paper on formulas and lectures.
An idea sparked up in his mind, deciding to play around a bit.
He kissed the other on the cheek to try to get his attention.

"Ugh, Gilbert not now! Study. We have to study." Mathew whined.

"Well, I can't study! Here's an idea...
We'll do a quiz!"

"That's actually not a bad idea. Alright!"

"With a twist. For each question you get wrong you'll have to strip off one piece of clothing." Gilbert grinned.

Mathew only blushed in response, but agreed anyways.

For the first round, Gilbert had lost, removing his sweater with a band name on it.

The second round, Gilbert had lost again and removed his shirt.

"Birdie... It's so unfair! Why am I the only one losing?" Gilbert said, towards Mathew who seemed to be distracted by the other's naked chest.

"Not my fault you don't get the questions. I'll give you an easier one.
What is a circumference?"

"The distance around the circle."

"Correct!" Said Mathew, giving a small smile.

"Okay, what is the element formula for glucose?"

"Erm... C6H6O6?" Mathew asked unsure about this one.

"Nope! Hydrogen has 12 atoms."

Mathew sighed, removing his watch.
Gilbert pouted, wanting the other to take off his shirt.

By the tenth round, there were many ties, but they were both in their boxers.

"Do you think you're ready for the exams now?" Mathew asked, looking anywhere but Gilbert.

"Yes... How about you?" Gilbert asked back, unable to take his eyes off of the blushing Canadian.

Mathew nodded in response, feeling the atmosphere get a bit awkward.

They were both staring into each other's eyes, travelling down their chests, and looked at their boxers.
Mathew was wearing a boxer with cute polar bears going all around it while Gilbert's had the Prussian flag.

Gilbert decided to take the first move,
pushing Mathew down onto the bed, and kissed him thoroughly, clashing their tongues together.

Mathew let out a small squeak before returning the kiss, letting the other dominate and feeling the other's tongue run around his mouth, feeling it over his teeth, while he sucked on Gilbert's tongue, and he hadn't noticed but he closed his eyes, then tilted his head to the right, deepening the lustful, needing kiss.

Gilbert grinded into the other, earning a mewl.

"That was adorable." Gilbert teased, kissing down the other's neck, leaving a shivering Mathew in the process.

"S-shut up..." Mathew blushed, giving Gilbert more space by tilting his head up.

Gilbert sucked on a sensitive part of the neck, and bit into it, earning a moan from Mathew.
The Canadian boy wrapped his arms around the other's neck as Gilbert continued to abuse the poor area, and his arms were groping around the other's chest, pinching a nipple.

"Gil... That hurts..." Mathew whined.

Gilbert chuckled, feeling like a sadist for a moment, before trailing his tongue towards the pinched nipple, and sucked on it.

Mathew felt warmth engulfing the area, and had moaned again in the process. He made sure to keep his voice down to not disturb the neighbours... Like last time.
That was embarrassing.

His chest wasn't the only thing that felt warmth however.
It had travelled down past his abdomen, into a more... lower area.

Due to the position they were in, Gilbert was able to feel it poking into his stomach.

"Someone's getting hot."

Mathew blushed whining for Gilbert to continue.

Gilbert teased the other by stopping and staring down at the other's figure.
A flushed face, toned skin, and lustful violet eyes were staring right back at him.

Mathew let out a small growl going a bit impatient.
He grinded his hips into the other's, and Gilbert grunted, feeling his member grow harder by the other's action.

"Gil... Please..." Mathew said, panting like a cat in heat.

Deciding to stop the teasing, he kissed his lover again, his other hand teasing the hem of the other's boxers.

Slowly sliding them down, he parted away from the Canadian's sore lip. He had nipped at it a lot and it seemed to swell up a bit.

Gilbert kissed the head of Mathew's member, earning another lustful moan.

"Gilllll..." Mathew whined, ushering the other to just do it!

The Prussian decided to finally stop teasing as he deep throated the member, sucking at it like it was a tasty treat.

"Ahn~" Mathew cried out, pleased with the blowjob.

"W-wait, Gil, stop!" Mathew said.

Gilbert pulled away his lips from his lover's phallus.

Red meeting lavender, they were both tinted with a cloudy lust.

"I almost came... I want you to... Take me. We'll come together." He said, blushing heavily from the embarrassememt.

"Birdie, are you sure about this?"

"Y-yes."

"Absolut-"

"BAISE-MOI!!" Mathew almost screamed out from frustration.
He would get blue balls at this point.

"I'm just making sure!" Gilbert said.

He held three fingers in front of Matt's mouth.

"Suck."

Mathew did just that, coating the pale fingers in thick siliva.
He threw a heated glance towards Gilbert, earning a thick blush from him, as he was teased by the other's mouth.

He felt pre-cum leaking through his boxers at this point...
He might even orgasm without having any physical stimulation just by seeing this.

He pulled his fingers away.
"I think that's enough, kesesese~"

The albino went back to his straddling position, circling Mathew's hole before pushing it in.

Oh, the fleshy walls quickly contracted and adjusted to having one finger inside.

He added another, earning a pained squeak from Mathew.

"Eek!"

"Are you okay? We can stop here if you want t-"

"N-no. Please help going!'

Gilbert slowly started to scissor the other, stretching him enough so it won't hurt as much when he put it in.

After a few minutes of scissoring, he thrusted slowly with those fingers I'm different angles, hoping to find that-

He was interrupted by a loud moan.

Found it.

He hit into it a few times before pulling out his finger, earning a whine of protest from Mathew.

After lining Mathew up with his member, he quickly made one thrust in, since it was going to hurt either way.

"GIL!!" The Canadian started to cry.

Two fingers was not as thick as one dick.
The pain was a burning sensation, it felt like it was never going to stop.

"Mein gott, I'm so sorry birdie..."
He whispered sweet nothings into his ear.
He hugged the other in an attempt to comfort him.
Mattie was just so tight for Gilbert and it took every energy in him to mot just thrust in rapidly.

A few minutes have passed, and Mathew bucked his hips down, moaning.

"I think I'm good now..."

Gilbert nodded, getting the message.
He started a slow pace, hitting the Canadian's prostate over and over.
The pain was dulled, mixing in with the pleasure.

"F-faster!!"

Gilbert complied. He had a lover to please after all.

Mathew screamed and moaned, digging his nails into the bed sheets, grasping a good bundle of them.

"Merde, Merde, Merde..." he chanted, as Gilbert thrusted in faster.

He was grunting and moaned himself, his sensitive organ was being filled with pleasure from the warm and cozy hole of Mathew's.

"Oh my gosh Gil- This feels so good!!
I-I think I'm going to..." Mathew moaned out loud, not caring if the neighbours heard anymore.

"Ah~ I'm close too..."

They both screamed each other's names out, hot white ribbons spurting deep inside of Mathew while Mathew's spurted all over Gilbert's chest.

Gilbert collapsed in exhaustion, hugging Mathew and pulled the blankets on top of them, not caring that they were lying in their own semen. They'd clean it up tomorrow.

"Je t'aime."

"Ich liebe dich auch"

Those were the last words exchanged.

All this because of one study section...