100 years old
"Damn, I'm going to die in this pile of crappy homework," grumbled Itachi as he left the room. That moment, he felt at tiny figure clinging onto his legs. Five-year old Sasuke looked at his brother with huge watery eyes that had the shine of innocence that characterized him.
"What's up, ototo?" Itachi asked as he picked the toddler up and poked his chubby cheeks.
"Don't die…"
"Huh?" Itachi tilted his head in confusion as he watched his brother's lips quivered.
"Don't get killed by homework," mumbled Sasuke.
"I won't. Don't-"
"Don't die, onii-chan!" sobbed the young Uchiha.
"There, there," Itachi wiped the tears that flowed down Sasuke's cheeks, "I'm strong. So strong that I'll live up to a hundred years old." He grinned.
Sasuke blinked the tears away and wiped the mucus that was leaking from his nose with the back of his puny hand. "Really?"
"Yeah, really. See?" Itachi flexed his muscles. Then, he lifted his pinky finger to Sasuke. "It's a promise."
Finally convinced, Sasuke happily shook that pinky with his own. He smiled, revealing rows of pearly white teeth. "Pinky promise!" he chirped.
Comments: First fanfic Dx I'm a fan of SasuxIta. Not in a yaoi way, but rather their love as siblings when young. So that inspired me to well, write this. The events are written from experience so if I might not update as often. Lotsa love, Rin!