Kurenai's Decision: Team 8 Left Behind

is episode 203 of the original Naruto anime.

Synopsis
Naruto encounters a girl named Yakumo, who, by drawing a picture of Konoha, causes lightning to strike Tsunade's mansion. Shortly thereafter, Kurenai Yuhi resigns as leader of Team 8, and Naruto is determined to find out why. Later, Kurenai goes into Yakumo's Mansion.