The detective (mha x male batman reader)

a/n: I told you all it was coming.

U.a we know it as the school which helps young students grow into strong heros but it wasn't always like this. belive it or not there were heros before all might. the team was called the justice leauge. but eventually the villains of the leauge started working together. they started picking off the leauge one by one. from superman to wonder woman to green arrow to many others. the only hero who survived the massive villain attack was an old Bruce Wayne. who had watched all of his wards die by the hands of the joker. but Bruce knew that the mission had to go on. one day a 9 year old boy named y/n lost his parents due to a petty thug. sound familiar? Bruce took the kid in and for the next few years y/n was trained by Bruce to become the next batman. what will happen next well let's find out.