Kean scored in victory over AC Milan before Christmas.
“When I chose Verona, I didn't make any calculations," he told Tuttosport.
“I'm happy with how these last few months have gone, but I can and must give more to the team and their fans.
“I'm 17 years old and I know I still have a lot to improve on. My goal against Donnarumma? Gigio's a friend.
“We talked before the match. After that, we didn't cross paths again. He's one of the best goalkeepers in the world.
“However, it was more exciting to score against Milan than him. Right there, my first thought was, 'now I have to score another, we have to win.'"