Story Summary: Sasuke defeats and kills Naruto at the Valley of the End and it's only afterwards he realizes that he never wanted the blonde dead. Panicking, he tries to use medical chakra to revive Naruto, only Sasuke doesn't know what he's doing. His desperation causes his Sharingan to do something unprecedented when mixed with the leaking Kyuubi chakra coming from Naruto: Naruto is brought back to life and Sasuke is suddenly a small, black fox. Canon AU starting after their first Valley of the End fight. NaruSasu/SasuNaru