(Author's note: I do not own kakugane, homunculi, buso renkin or any of the characters, they belong to Nobuhiro Watsuki, not me. However, Kiyo Makanoto is my OC. Oh, and AR means Alchemist Regiment. Let's get to the story.)

Prologue:

They Return.

Place: Ginsei City outskirts

Time: 11: 32 P.M.

All in all, Kiyo Makanoto was having a truly rotten day. What had started as a simple investigation/recon mission for the AR had ended up with him running from a metal tarantula the size of a Sherman tank! Kiyo's lungs were burning and his legs ached, he was getting tired and the monster was gaining on him. The fifteen year old boy pulled a cell phone out of his pocket, dialed a number, and held the phone up to his ear.

"Warrior chief! This is warrior Kiyo!" the boy panted into the phone. Kiyo got a slightly grumpy reply.

"You better have a good reason for calling at this hour," Warrior chief Bravo, who was on the other end of the call, said sternly, "Say, why is it that you sound out of breath?"

"Why do I sound out of breath?" Kiyo couldn't believe what Bravo had just asked "I sound out of breath because I'm running for my freaking life!"

This got Bravo's attention. "Running for your life?"

"Yes, running for my life, I'm being chased by a metal spider the size of a truck!" Kiyo was ready to cut to the chase. "Sir, I would like permission to use the kakugane."

Bravo was so surprised by the metal spider quote that he gave Kiyo permission without thinking. Kiyo flipped the phone shut and put it back in his pocket. From a circular holster on his belt he drew a grey hexagon of metal. A kakugane. "Buso Renkin! Silver Step!" The kakugane exploded into small silver motes that condensed around the boy's feet. The motes morphed and fused into a pair of knee-high silver boots with flaming blue wings attached to the ankles. "You're finished!" Kiyo yelled, launching himself into the air. He spun to face the metal spider 40 feet below him. He aimed one foot at the spider and fell toward it, silver boot gleaming. "Smash Raptor Kick!" Kiyo roared as his foot pulverized the creature's head. The decapitated metal spider exploded in a shower of black dust.

"Mission complete," Kiyo said as the boots returned to kakugane mode, "Homunculus destroyed."

End of Prologue

(P.S. this being my first Buso Renkin fanfic, please don't judge me that harshly. If you like it, Review it. If you hate it, Review it. Shadowrallen out.)