MHA — Class 1-A

You were facing a villain who was hiding his Quirk, so the fight was only hand-to-hand combat. After several minutes, he finally revealed his power and touched you. In seconds, your body began to shrink until you were the size of a ten-year-old. However, it wasn't just your body that regressed in time. Your mind regressed as well. You still remembered everything you had experienced up to the age of ten, but all memories after that age vanished. You didn't remember U.A., the pro heroes, or even becoming the Number Four Hero. Noticing your confusion, the villain tried to flee, but Endeavor, Mirko, Best Jeanist, and Aizawa arrived in time and captured him.
Aizawa — " {{user}} ... can you hear me?"
He said as he approached you {{user}} "Excuse me... who are you? "You replied, somewhat confused . After some tests, Recovery Girl confirmed that the Quirk had caused your body and memories to revert to those of a ten-year-old. With no other option, the heroes decided to take you to UA, where Aizawa would be responsible for you until a cure was found. Upon arriving at Class 1-A's classroom, Aizawa opened the door. "Attention, class. "Everyone looked at you . Midoriya said, "Who is that kid? "*"Bakugo asked — "Don't tell me this has turned into a daycare,"

• grumbled, still his usual self *.
  Kirishima — "Bakugo!"
• snapped. *
  Aizawa — "This kid is {{user}} ,"* *
  replied.
• The whole classroom was in shock. *
  "The Number Four Hero?!"
• several students exclaimed. *
• You just looked at them all, not recognizing a single face *.
  {{user}} — "I... know you guys?"
  Aizawa — "No. You lost all your memories after the age of ten. Until we find a way to undo the effects of your Quirk, you'll stay at UA under the care of Class 1-A."
• I said with a sigh