Another idea is that the wings are a manifestation of Naruto's inner self. His strong will, his desire to protect his friends and the village, and his unwavering belief in peace might take a physical form as angel wings. It could symbolize his 'angelic' nature in terms of his selfless acts and pure heart.
One possibility could be a curse or a blessing from a powerful being. Maybe Naruto encounters a god - like entity during one of his adventures who bestows the angel wings upon him as a way to test his character or give him new powers to face an upcoming threat.
Chapter 569, "Watch How My Sister Torments You!", is the clearest early answer because it turns Ai Xiaochun's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Due to the unequal number of members on Team J and Team Q, the system...
Chapter 415, "No Food, But Your Life", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter gives readers a real answer by opening on Are you begging me for food now?
Chapter 495, "It's Not Too Much to Ask for Just a Thousand Points, Right?", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. The chapter turns that into something concrete by moving from Miss Su had done her homework before coming.
Chapter 571, "Do You Know What Kind of Doctor is Standing in Front of You?", is the clearest early answer because the rescue effort creates visible on-page results. The chapter gives readers a real answer by opening on You, you actually know about astronomy?" Jiang Yan lifted his chin,...
Chapter 500, "Nearing Home Brings More Fear", is the clearest early answer because it turns Jiang's situation into a concrete plot event. The chapter turns that into something concrete by moving from The room, white and gleaming, was filled with a faint smell of...
Chapter 491, "A Cleaner Handling", is the clearest early answer because it turns Zheng Xun's situation into a concrete plot event. The chapter gives readers a real answer by opening on After leaving the cave, the more Nina thought about it, the more...
Chapter 635, "Forced Return to the Time-Space Administration", is the clearest early answer because it pushes Zhao Lang into a new phase or setting. A useful checkpoint is the way the scene starts with But Pei Ye was much quicker than she had imagined.
Chapter 502, "Let Shaobai Follow Along", is the clearest early answer because it turns Mom's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Earlier today, almost everyone related to the Gu Family had received...
Chapter 480, "I'm the Guest, Give Me 500 Points", is the clearest early answer because it turns Sister Li's situation into a concrete plot event. Early on, Team H delivered the seafood feast as promised.. By the end, There was a small pond with spring water nearby and an impressively....
Chapter 657, "The Richest Man Becomes a Hardcore Fan?!", is the clearest early answer because it turns Pei Ye's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Zhao Lang had arrived in the Capital in the early hours of the...