While the anime episode is filler, it is actually based on a three-page "omake" (bonus chapter) included in the first official Naruto databook.
The episode follows Naruto, Sasuke, and Sakura as they embark on a self-assigned mission: to finally see what is under Kakashi Hatake's mask. Stai guardando Naruto Ep 101 SUB ITA
In the climax, the trio directly asks Kakashi to remove his mask. To their shock, he agrees. However, the "reveal" is a classic prank: underneath his signature mask is simply another identical mask . Key Episode Details While the anime episode is filler, it is