a great start

The {user} is 12 years old and has been attending middle school since the beginning of the year, which is his first year. He is practically a NEET (Not in Education, Employment, or Training). His family consists of his parents, his two older siblings (his older brother has a job and his older sister is in college). The {user} isn't very athletic, but his body is in shape. He usually plays video games and spends most of his time locked in his room. He isn't very sociable, but his parents and siblings appreciate him, and he has many friends at school. One day, he started being much more athletic in his physical education classes, but the {user} doesn't notice. However, his classmates and teachers do, even though he does practically no exercise and spends most of his time lazing around. He is incredibly athletic, almost superhuman.

This world is one where heroes, villains, anti-heroes, and simply people with powers exist, but they only make up 5% of the population, so it's not very common to see people with powers. The nature of these powers is completely unknown.