Diabolik Alchemist (Diabolik Lovers/Fullmetal Alchemist Crossover AU)

Prologue

Shuu Sakamaki

My eyes snapped open as one of my hated father's familiars landed on my knee. I rolled my eyes, sighing begrudgingly, and took the letter from the bat. I tore it open and gasped after reading the contents.

"You guys better come and see this," I said to the empty room. No one replied, not even Reiji. I sighed. "What a pain... It's from him."

Subaru tsked, appearing against the wall with his eyes closed and his arms crossed. "What could he possibly want now?"

"Is it another bride?" Kanato asked, leaning against the back of the settee with Teddy secured in his arms.

"Don't you mean glorified blood bag?" Ayato tilted his head towards his smallest triplet from his cross-legged position on a sofa chair.

Raito chuckled from his reclined position on Kanato's settee. "Did I just hear something about a new blood bitch?" He licked his lips. "I get all hot just thinking about it," he blushed as his eyes closed, feigning a look of bliss.

"It's unbecoming of a man to act so wanton in a common area," Reiji commented from his stance next to the double doors. "If you wish to act as such, please excuse yourself to your private quarters."

Raito's lips twisted into a smirk, narrowing his eyes on Reiji. "That's not what you said last ni—"

"That's beside the point!" Reiji exclaimed, cutting off Raito with a bright red blush and a glare. "What did you call us here for?" He turned towards me and pushed up his glasses in frustration. "I'm sure it wasn't about a sacrificial bride; since, you never seem to think we need to be informed."

"Karlheinz says that the Mukami brothers are coming to live with us," I said, giving them half of the answers that they were looking for.

"Yours Truly has already been made aware of that possibility. Tell him something he doesn't expect or know," Ayato said, arrogantly.

I sighed at his narcissistic antics, then continued, "Karlheinz says we will also have a visitor of the alchemist variety."

"That isn't all, is it?" Reiji asked, presumptuously.

"This alchemist is part of the first generation of combat alchemists and Karlheinz wants us to aide him at teaching combat alchemy at his pet school, Ryoutei Military Academy," I told him, disgust written into my features.

"How is it possible that a first generation is still alive?" Reiji questioned, perplexed.

"I am not a pawn to be manipulated in that man's game!" Subaru yelled, slamming his fist into the wall next to him; which, cracked under the force of his blow. "Damn, I'm pissed..."

Another demon familiar flew into the room with a large parcel that proved to be much too heavy for it. The parcel was dropped on Reiji's head; where, it knocked his glasses off and scattered blueprints all around him.

Ayato and Raito burst out laughing at Reiji's unamused expression. Ignoring our half-brothers' antics, Reiji picked up his glasses and one of the blueprints. His eyes widened after looking over it and the familiar quickly left the room.

"These are nerve-connected reinforced carbon prosthetics," Reiji said, surprised.

"Excuse me?" Kanato asked with confusion.

"Automail," Reiji answered; before, pausing. "But father made sure to wipe its existence from history... He must have kept these designs just in case he would need them for further use or personal gain. Unless..."

"He sent for Fullmetal," I finished.