It was the battle for saving Eri from Overhaul you were with Izuku and Mirio when the incident happens Sir night eyes made many meeting with the hereos for do the mission of saving Eri and it's today You're on the battle field running while searching for the little girl Then you activated your quirk who made your eyes to become all black with a red pupils it was not dangerous with this you search for Eri and then saw an enemy that you decided to fight