The chapter title is the prompt :)

PLEASE READ THE FICS IN THIS SERIES BEFORE READING THIS! THANKS!

Usually, when his dad was smiling, Sun would smile as well; it was nice seeing him happy.

The current grin on Mao Mao's face, however, was anything but comforting.

"You ready, Sun?" The cat asked, unable to hide the glee in his tone.

"Dad, I'm not sure how this is supposed to help-"

"That doesn't sound like you're ready!"

Sun sighed and slid on his helmet, buckling it under his chin. "...Fine, I'm ready."

"Remember to avoid, block, or hit back the projectiles by using your dice. This is to teach you how to-"

"I know I know, let's just get this over with," Sun muttered; this wasn't the first time his father had thrown stuff at him and disguised it as training, probably wouldn't be the last time either. The canuki got into battle position; his haunches bent while his dice was ready to be thrown. "3…2-"

"Start!" Mao Mao interrupted, throwing a metal wrench at his son even before he had counted down to one.

"W-wait, I haven't-!

THUNK!

There was a moment of silence as Mao Mao watched the younger boy slowly slide to the floor, cupping his paws over his crotch; the canuki's face screwed up in pain.

The cat sighed and walked over; looking down at the teenager, who was currently curled up on the ground withering in pain; getting a wrench to the nuts was anything but fun. "You forgot the first rule of being a hero, always be prepared for anything!"

Sun only groaned in response.