A/N: This is a prologue, of sorts, really just read/review and let me know if this is a failed idea, or if I should continue.
Sakura glared down at the ground, this was the final straw. She was tired of always being picked on, by everyone. Her fist snaked out and struck Naruto in the face, sending him flying. She had broken his nose and it was bleeding, and had bled onto her hand. The sight of the blood on her fist entranced Sakura and she shakingly brought it to her lips and licked it off. The coppery taste was a delight to her, and she didn't know why she hadn't tried tasting blood before. Her pink hair hid her face from the world and from the rest of her team, Kakashi-sensei, and Sai, who appeared to be shocked by her actions. Why, she always punched Naruto when he was being an idiot, maybe it was the blood on her hand and what she did with it. She felt her Inner Demon take over and barely managed to keep her contained, she didn't want to kill everyone, just to taste the sweet blood.
Sakura looked up at Naruto, who was about ten feet away, he was holding his nose and it was gushing blood. Sakura walked up to him slowly and picked him up by the hair, ignoring his protests. She touched the blood that managed to escape from his clenched hands and brought it to her lips, tasting it, the sweet, metallic blood. She barely restrained herself from ripping Naruto's arms away from his nose and drinking the blood gushing from it, instead flinging him behind her, back towards the rest of her team. Her heart was beating rapidly as she turned and saw Kakashi-sensei's and Sai's face, it was obvious that they were shocked by her actions, and possibly disgusted. Sakura didn't care anymore, she turned and walked away, needing to get away before she did anything stupid, like killing them.