This is who I am! (Brand New Animal x Male Shadow Reader)

Y/n is best friends with Michiru and Nazuna since they were kids. Y/n had a sister named Maria who was terminally ill and their grandfather Gerald Robotnik was researching a cure for his granddaughter with the help of multiple people including the Mayor of Anima-City after much begging. But one day, the Guardian Units of Nations saw the potential of using Beastman DNA and alien DNA to create the ultimate lifeform. At the same time, Gerald refused at first, he reluctantly agreed if he wanted to save Maria, but he needed a test subject, and that was when Y/n volunteered. While the boy's parents didn't allow it at first, they agreed it was the only way to save their daughter. The boy made letters to his friends in case he didn't make it. Years later, Y/n, now named Shadow the Hedgehog, awakens in Anima-City and is searching for his friends.