You were fighting an old friend of yours that turned your back on you and your other friend, nearly killing the both of you back then

F/N: laughs sinisterly well, this was very interesting, your still very weak, ya know that? Hah, well enough of that, meet Aizawa's and Mic's old friend Oboro Shirakumo, which is now, Kurogiri

Your eyes went wide, Aizawas and Mic never told you they had an old friend that turned into a villain too, why didn't they tell you about this...?