I'm not sure specifically as I haven't read it in detail. It might be about various adventures, character developments, and a fictional world filled with unique elements.
The main plot involves the protagonist's growth journey in a world full of challenges and powers. He has to face various difficulties and enemies to become stronger.
One of the main themes is growth. The characters constantly grow in strength and maturity throughout the story. Another theme is friendship. The relationships between the characters play a crucial role in their adventures. And there is also the theme of perseverance as they face numerous challenges and keep pushing forward.
You might be able to find it in some specialized bookstores that carry a wide range of light novels. Also, online book retailers could be a good place to look.
Tang San is highly popular. He has a complex personality and his growth arc is really interesting. Xiao Wu is adored by many because of her relationship with Tang San and her own strength. Another popular character is Oscar. His role as a food - based soul master is quite unique and his development throughout the story makes him a fan favorite.
Sakura could be an unexpected character to have the Sharingan. It would completely change her character dynamics. She could use it to enhance her medical ninjutsu, seeing the internal body structure more clearly. Also, she could become a more formidable fighter, using Sharingan - based genjutsu to her advantage.
In fanfiction, Naruto could get the Sharingan through a blood - related connection that is revealed later. For example, it could be discovered that he has some distant Uchiha ancestry that gets activated somehow. Maybe a powerful enemy's attack awakens this dormant Uchiha blood in him, and as a result, he develops the Sharingan. It could also be that a powerful sage or a new character uses their own unique powers to bestow the Sharingan upon Naruto for a specific purpose.
In a Highschool DxD OC and Sharingan fanfiction, you can incorporate the Sharingan powers in the story by making it a source of mystery and envy among the other characters. The OC could use the Sharingan's ability to enter the minds of others (a more advanced form) to gather information about the devils' plans. This would make the OC a valuable asset to their group. Also, the Sharingan could have a connection to some ancient prophecy in the Highschool DxD world, which would add more depth to the story and make the powers more significant in the overall plot.
Naruto might adapt by first trying to understand the basic functions of the Sharingan. He could start with the simple ability to see chakra flow more clearly. Since he has always been perceptive about people's emotions, he could use the Sharingan to read the emotions of his enemies through their chakra, which would help him in battles.