Raising the Sports Anime Protagonist in the Ace of Diamond World

Tenkawa Chi is an ordinary, plain little pretty boy. He thought his life would go smoothly, never expecting to get bound to a System and become completely OOC. During the red-and-white game, he enthusiastically opened his mic: "Mada mada dane!" While batting, he faced the pitcher and said, "Hahahaha, I'm going to crush you completely!" His mascot is always by his side. Premise: Work hard and strive through your youth.