A possible plotline could be that Naruto is sent on a mission where he has to deal with a group of people who communicate solely through emotions. Since he doesn't understand emotions well, he struggles to complete the mission. Another one is that he tries to form a closer bond with Sasuke, but his lack of emotional understanding keeps creating misunderstandings between them.
It could be that the author wanted to show Harry Styles' character facing a challenge in understanding emotions to add depth and complexity. Maybe it's related to his past experiences or a specific event in the story.
One way is to put Naruto in situations where his lack of understanding of emotions causes problems. This could lead to conflicts with his friends or allies. As he tries to resolve these issues, he begins to figure out how emotions work. For instance, if he accidentally offends someone because he doesn't get their emotional state, he has to make amends and in the process, learn about that particular emotion.
In fanfiction, Harry may not understand emotions because of his traumatic experiences. Losing his parents at a young age and constantly being in life - threatening situations can make it hard for him to process emotions. He's always in survival mode. And, he might be so focused on the big battles and challenges in the wizarding world that he overlooks the subtleties of emotions. For example, he might not understand the deeper feelings of loyalty among his friends until it's put to a real test.
Perhaps he was cursed. In the wizarding world, there are many dark curses that could affect a person's mind, and one such curse could target his emotional understanding. Also, it could be due to his isolation. Harry has often been alone or felt alone, and this lack of regular social interaction with a diverse range of people could have made it difficult for him to develop a normal understanding of emotions.
Well, in his relationships, it causes a lot of confusion. His friends may try to communicate their emotions to him, but he just doesn't get it. This can lead to misunderstandings and even arguments. In a romantic relationship, it would be even more difficult. He might not understand the concept of compromise or how to make his partner feel special. Since he doesn't understand emotions, he could end up making his partner feel unloved or unappreciated.
Well, it affects his relationships in a rather complex way. Since Harry doesn't understand emotions, he may come across as aloof or uncaring to those around him. His friends might feel neglected or unappreciated because he doesn't pick up on their emotional needs. This could lead to a strain in his friendships. Also, in romantic relationships, it would be a huge obstacle as he would struggle to empathize with his partner's feelings, making the relationship lopsided and potentially unsustainable.
He could become more idealistic. Since he doesn't understand hatred, he might strive to create a world where everyone gets along without any grudges. This would make him a very different kind of hero compared to the Naruto in the original series.
One possible plot development could be that Naruto goes on a journey to try and understand love. He meets different people along the way who teach him about different aspects of love, like an old sage who tells him about self - love and how it's the foundation for understanding other kinds of love. Another could be that his friends try to set him up on dates to help him figure it out, but it just leads to a series of comical misunderstandings.