He could be hiding from Orochimaru. Orochimaru has always been interested in Naruto's power. Maybe Naruto has discovered a new power that Orochimaru wants even more desperately, so he hides behind a mask to avoid Orochimaru's detection.
Another option is that he's hiding from his own friends. Maybe there's something he's ashamed of or a secret he's keeping that he doesn't want his friends to discover. So, he uses the mask to create a barrier between his true self and them while he tries to figure things out on his own.
If you want the clearest chapter reference, go to Chapter 131. Early on, Just around mealtime, Director Sun came over pushing his small food cart.; later, the chapter leans on There was a loudspeaker tied to the top of the cart, which was....
A practical answer is Chapter 121, because it turns the idea into a concrete scene. The chapter opens with Seeing that Wen Jiaojiao's condition had improved significantly, Director..., adds pressure through How the hell was it a huge muddy field?!, and ends on You're supposed to be a man who.
Chapter 163 is the strongest chapter-level answer because it starts from Su Yinwan entered a small room, guided by a staff member. and follows through on Moreover, by doing so, the online viewers would think her more innocent....
If you want the clearest chapter reference, go to Chapter 109. Early on, And another thing," Jiang Li said, taking out a tissue to wipe her lips,...; later, the chapter leans on The next time we have a meal, don't try to chat with me unless you're fine....
Chapter 119 is the strongest chapter-level answer because it starts from What is Princess Wen talking about? and follows through on For some reason, he always felt there was a mysteriously calming power....
If you want the clearest chapter reference, go to Chapter 134. Early on, After a brief noon rest, the production team was up to their antics again.; later, the chapter leans on Just as several guests had finished their relaxing hot showers and were....
The best chapter pointer here is Chapter 167, "Roommates Became Fans of Jiang Li after a Variety Show?!". It opens with By the experimental field, Qi Tianyu was quite helpless as he watched Wen... and closes on Even when getting into the car, Qi Tianyu was still savoring the moment in....
Look to Chapter 134 for the clearest answer. It begins with After a brief noon rest, the production team was up to their antics again., keeps building through Just as several guests had finished their relaxing hot showers and were..., and lands on [Are you kidding me, is Jiang Li putting on an act.
Look to Chapter 141 for the clearest answer. It begins with It had happened in the afternoon when Aunt Ying's son and daughter heard..., keeps building through They went straight to Jiang Li's door and insisted on thanking her., and lands on Jiang Li couldn't help but laugh and cry..
Look to Chapter 140 for the clearest answer. It begins with In the evening, the setting sun was like blood, dyeing the entire earth a..., keeps building through Although there had been a cool breeze in the mountains in the afternoon,..., and lands on I was just joking, just joking." Seeing that.