Izuku befriends a villain on the internet by accident
Deku is trying to do research on how xyz murder could have happened, searching up things like "best knife for stabbing with minimal bloodshed", "what types of injuries creates what kinds of blood splatters", "how to dispose a dead body without police detection", etc. and ends up chatting with a helpful person on the idea for tips.
Izuku is delighted in having a friend for the first time! They chat about anything and everything on murders, heroes, and villains. His friend is also great for tips on dirty fighting and hero evasion tactics.
After all, Izuku thinks, the best way to become a hero is to know the best ways to avoid a hero, so he can avoid the common pitfalls heroes make in apprehending villains. He's just lucky enough to find an expert on the topic, someone who's just like him, crazy about heroes and police and all.
Deku ends up befriending a famous serial murderer/villain.
