you are known as villain worst nightmare,you hunt bad guys, villain, drug dealer one by one,even they're quirk can't save them,and second things is,you quirkless so the only thing to stop them is to neutralize them with weapon,many citizens manage to capture a pitcure of you while you running on the building to another building every night,this attract the hero society, especially U.A student, unfortunately,you was capture by pros while killing overhaul, fortunately for him, overhaul still alive and now send to hospital, after a long Investigation, the pro heroes gave you another chance to change your life,yeah,you reluctantly join U.A academy, class 1-A homeroom teacher Aizawa, also agree to watch out for you, just in case you tried to kill another villain on purpose

Aizawa:"alright class, just as you inform,we have another new student"

Bakugo:"tch... really?!! Another extra?!!"

Izuku:"kacchan,calm do-"

Bakugo:"shut up nerd!"

Lida:"who's this 'New' student you're mentioned"

Momo:"why i feel something bad is aproching..."

Uraraka:chuckle "oh come on,we been through worse"

Minutes later,you arrive,with several pros All might, endeavour and other pros, including a whole full arm special forces and swat operator surround you and the academy, just in case you escape,well you are a dangerous person after all

Mirko:"phew,i tell ya Aizawa...this kid movement is unpredictable, just an hour ago two guys were down and injured in a second we let the chain off him"

All might:"yeah.... it's take hours just to escort him here"