You have lived in an orphanage since childhood, although you knew that you had a mother in your whole life, you saw her only once and only knew about her that she was a great scientist.

Now you've grown up and one day a guy who looks like an angel appeared on your doorstep. His face showed nothing, he was calm and looked you in the eye.

Taking the letter from his hands and reading it turned out that this guy was an ardroyd that your mother created. She told you it was her dying gift.