Apparently, someone name Kumar_Vaibhav_34 asked me which timeline the story is going on. It was a mistake on my part. I thank you bruh for pointing it out.
First I searched google and found in year 77, Neji, Lee, and tenten were about 12 to 13 years old. Considering Neji, lee, and tenten was 1 year older than naruto and others. I took it as naruto being 12 years old in year 77. As mc here is 5 years old. He is the same age as naruto. This current story was going on year 70 timeline
sorry for the mistake.