Author's note: An idea that had been sitting in my head for quite some time. I just decided to write it out when I was bored. I was trying to capture their personalities correctly so I apologize for any personal touches added to them.

Contains mature material including strong language and possibly sex in future chapters.

The first thing that Mathias noted was there were two other people on either sides of him. Their warm bodies were uncomfortably close to his and a feeling of shame came over him. He turned, attempting to squeeze his way out of the two masses.

"Oi, stop moving, Mathias," came a gruff voice to his right. Gilbert's taut chest was barely covered by the blanket that covered all three of them.

"Why are we in a bed together?" Mathias commented, realizing that his arm was trapped under Arthur's stomach. With a jerk of his shoulder, he pulled it out, glaring at the Prussian.

His companion's only response was to face away from him, tugging the blanket closer to himself. "Last night, we were drinking again. I don't remember anything else, 'kay?" Gilbert grumbled.

Then, he noted that something felt weird about his body, especially his chest. He looked down and nearly fainted. When had he gotten those? Mathias' throat seized up as he opened and closed his mouth, unsure of what to say.

"Gil? Gil?" he stammered, using a hand to shake the Prussian violently.

"Oh, for fuck's sake I have a fucking hangover. You got that, ja?" Gilbert snarled, turning around to face Mathias. However, as he looked at him, a furious blush hit his cheeks. "Mein gott, are those…real breasts? Or is this part of the hangover?"

He reached forward to touch them as if to assure himself that they were real. His hands never got there as Mathias slapped it away.

"Don't touch me, you fucker," Mathias growled, scrambling off the bed. She grabbed at the blanket, covering her parts with the object, leaving the Englishman and Prussian on the bed, very unmodestly clothed in boxers.

"What the fuck," Gilbert gaped. "Artie…wake up so I don't shit myself. I can't believe it…"

Arthur stirred a bit, rather annoyed as his green eyes glared at the Prussian. "Don't do it near me, then."

"No. Really. Look. Mathias has tits, ja?"

Immediately, his head shot up, a look of shock stamped on his features. "My god…"

Meanwhile, Mathias was dressing. She had managed to button up a shirt over her additions and pulled up a pair of pants. She cast a look of venom at Gilbert and Arthur, blue eyes filled with disgust.

"Please don't fucking stare at me like that," she hissed through clenched teeth. Then, after she was done, she was still met with gaping mouths. Shaking her head, she pointed at Arthur. "Tell me what happened last night…please."

Gilbert was first to snap out of it. He jabbed his elbow sharply at Arthur to shake him up from his stupor. Meanwhile, he was hastily dressed, eager to hide his male body from Mathias' now female eyes.

Arthur mentally slapped himself as he tried to remember. He recalled memories from the murky depths of his mind. Oh god…had it really worked?

"All right. Please don't kill me for this, Mathias, but you wanted to try it out."

Mathias inclined his head towards Arthur. "None of your English bullcrap and fucking tell me now," she snarled.

Gulping down his fears, he started on the narrative.