Reborn In MHA with a System

A teenager is given a choice, be reborn and forget their current life's memories or be reborn with their memories intact and buy a power of their choice but through the use of their karma. The teenager chooses the second option and says the power they want. The teenager once again, is portaled away.

In a hospital, a child can be seen waking up from a hospital cot in a hospital gown. They had fainted after their eyes flashed an intense light while attending their parent's funeral.
"I can't believe I was reincarnated in My Hero Academia... At least it's not Marvel or DC."

[Ding]

[Host's Past Life Memories Detected, Exiting Dormant State]

"I didn't ask for a system!"
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Authors Notes:
You want to know more details of the story. You know what to do.

RWBY was made by Rooster Teeth and My Hero Academia was made by Kōhei Horikoshi.

P.S. First time writing a story. Creative criticism is appreciated.