I once read a fic on ao3 about Spider-man got infected by a mysterious disease that only spread among people underaged. Those who got infected turned violence and then died afterwards (but later Natasha found out they are not really dead).
The whole avengers team, except Tony, don’t know the identity and the real age of Spider-Man.
I lost the fic and would like to find it out again.
Also, i love brainwashed/ mind-controlled Spider-Man, any good ones recommended?