You hit the ball again, trying to strain your hand as much as possible.

“Hey, wait, wait... Keep your arm straight and your leg slightly behind.” Shoyo helps you get into the right pose for serving.

After making sure that everything is right now, you serve the ball again, but again it doesn't fly as smoothly as you would like.

“Hmm... You hit the ball with the edge of your hand, but you should hit the ball with your palm.” The red-haired guy pointed to his hand. “Come on, try it again.” He smiles at you cheering, nodding.