Dunno where I got the idea for this, but I hope you like it! (I don't own Bleach, by the way)

Summary: Hinamori Momo always knew that her precious Shiro-chan was over protective of her. But to what extent is his protectiveness?

The young shinigami's breaths came out in clouds against the cold, frosty air. She was tired of this, and she didn't want to fight anymore. Looking up, she saw the sight that made her heart twist with pain, a pain that felt like a hundred swords stabbing her at the same time. "S-Shiro-chan," she stammered, hoping to bring the young taicho back to his senses. But it was no use. In front of her was Hitsugaya Toshiro, bankai unleashed, and about to use it on her.

~Flashback~

"Shiro-chan! Can I come in?" came a voice from outside the tenth division's office door. The captain inside sighed.

"Come in, bed-wetter Momo!" he called as the door slid open to reveal the fukutaichio of the fifth division, Hinamori Momo.

"Jeez, you're so mean, Shiro-chan! You still call me that name after all these years!"

"Well, you still call me 'Shiro-chan', don't you?" came the respond. "Let's not start that argument again, though. What did you come for?"
"Well, actually…Yamamoto-sotaicho has asked us to go out and exterminate a hollow together…"

The white haired shinigami raised an eyebrow. "Why did he call us two?" he asked. "Weren't there other available people?"

"This hollow is different!" Hinamori replied, waving her hands in the air as if to prove a point. "The captain-commander said it controls minds, and the only way to defeat it is to have perfect teamwork!"

"Who said we have perfect teamwork?" came the remark from Hitsugaya.

"Mou! Anyways, this is a mission given by the Sotaicho himself! We can't ignore it! Ukitake-taicho is sick, so he can't go out with Kyoraku-taicho, and no one else left works well with each other…"
"..I understand," the chibi taicho said, a little reluctant to get away from his paperwork. He stood up, and readjusted Hyorinmaru on his back. "Let's go."

oOo

When the two arrived at where the hollow was last sighted in the southern part of Rukongai, Hitsugaya immediately found its reiatsu, and they began to pursue it, hoping to quickly get the job of killing it done. When they finally reached the point where they could tell that it was nearby, they stopped.

"Hinamori," Hitsugaya said suddenly, assessing their situation.

"What is it, Hitsugaya-kun?"

"You said this is a mind controlling hollow, right?"

"H-hai.."

"Don't give in to it if it tries to reach your mind," the tenth division captain said, eyes narrowing as a bush in front of him rustled. He felt the hollow's spiritual pressure suddenly raise, and he was hurtled into a world of black. The last thing the small captain saw was the looming face of a hollow hurtling out of the bush, and its menacing grin as it took over his body and activated his bankai.

"Shiro-chan!"

~End of Flashback~

Hinamori Momo took one step back as her childhood friend began to race towards her, and spine-chilling smile on his face. "Stop it, Shiro-chan!" she screamed, tears starting to form in her eyes. "Don't let him control you!" But it was no use. The hollow, now in Hitsugaya's body, had reached the lieutenant and already had his sword raised to make the killing blow. "Time to die!" it screamed in a voice that was not the voice of Hitsugaya Toshiro, but a deep voice that sounded like nails on a chalkboard. "Ruysen-"

The name of the attack was cut off as the figure in front of Hinamori suddenly staggered, a torrent of blood spurting out of it's mouth.

"You bastard! What did you do?" the hollow screamed as it's life was extinguished, leaving the white haired captain's body to collapse. Hinamori rushed forwards to catch it before it hit the ground.

"Shiro-chan! Are you OK?"

After coughing up an excess amount of blood, Hitsugaya took a shaky breath and looked into his childhood friend's eyes with dull, turquoise eyes. "G-good…" he said in almost a whisper. "It worked…"

More tears were pouring down the fukutaicho's face. "What worked, Shiro-chan? You're coughing out blood! Don't speak; I'll call Unohana-taicho immediately!"

Slowly, the young captain shook his head. "It's too late," he said in his raspy voice, then smiled slightly. "But that Kurotsuchi finally did something worth mentioning."

Hinamori stared questions at her childhood friend, though tears were still running down her pale cheeks.

"I-I made him modify my body so that my organs would self destruct if I ever raised my sword against you, and it was against my will."

The truth hit the young vice-captain like a typhoon, and she dropped to her knees, still clutching Hitsugaya's body to her chest. "No!" she screamed, more tears dripping to the ground. "Shiro-chan!"

oOo

Later, in Soul Society, Unohana Retsu came out of the patient room in the fourth division, now labeled 'Hitsugaya Toshiro', blood staining her haori. The captain of the fourth walked over to Hinamori, who had been sitting on a bench outside the room. "We have fixed his organs, but he is still in danger," she said. "They were, well, torn apart, and there's no telling if he'll live…"

Unohana held the shaking body of Hinamori as sobs rang throughout the division.

But exactly twenty two hours and five minutes later, a machine in the patient's room beeped, an eerie sound that pierced through the silence. Hitsugaya's heart, which had just begun to heal properly, had stopped.

So did you like it? Please tell me your feelings about it. I don't care if you liked it or hated it, just give me your opinion. And I'd appreciate it if you gave me suggestions, too, because I really need to know how to continue this story. :D See you next time!