Nezuko is initially 12 years old in the manga. As the story unfolds, her age doesn't change significantly in a traditional sense, but her character development is quite remarkable.
Tsukuji, Shinobu, and Masayoshi were the three main characters in the tennis prince. Their pairing was often referred to as "Shinobu Masayoshi" or "Shinobu Masayoshi" for short.
A possible tennis prince's fanboy is Atobe's gift. The story was about the emotional entanglement between Atobe and Masayuki, as well as Atobe's cruelty and ruthlessness towards Masayuki during the competition.
In this article, the three Sugawara Fuji, Shinobu, and Shinki all had strong strength and deep emotional backgrounds. Their pairing was often controversial. In the storyline, Atobe's cruelty and ruthlessness towards Makoto in the game made people feel heartbroken, and Makoto's feelings towards Atobe were also very complicated.
A simple Nezuko and Zenitsu fanfiction could be that they go on a journey together. Along the way, they encounter other demon slayers who are initially skeptical of Nezuko. But Zenitsu stands up for her, explaining that she's different. This shows the depth of their friendship and how Zenitsu has come to trust Nezuko completely.