I still want to play tennis...
Seiichi Yukimura, recently diagnosed with Guillain-Barre syndrome, sat on his hospital bed.
He was thinking about a few things.
For example, whether he could keep playing tennis, whether to stick with medication or have surgery, and... how was the daisy by his window doing?
Yukimura couldn't help looking toward the hospital windowsill.
He expected to see the elegant white flower he pictured, but instead, all he saw was crimson.
A hideous, alien-looking monster was clinging to his windowsill.
Acting on instinct, Yukimura quickly grabbed the tennis racket and ball beside his bed and hit the ball at the monster with all his might.
The monster let out a scream and fell.
Before Yukimura could make sense of this bizarre scene, he saw someone climbing onto his windowsill.
"Hey~" The white-haired man showed no sign of guilt. Instead, he greeted him casually.
Yukimura: ...
Sorry, my hand holding the tennis racket is in... (laughs)
Also known as The Joyful Life of Hitting Curses with a Tennis Racket and Could a Tennis Player Become a Sorcerer?
*
I started this as a Jujutsu Kaisen fic. It'll probably be very short; it's just an idea! It follows Yukimura after he ends up in Jujutsu Kaisen and grows stronger (and trains in tennis). To keep the power levels balanced, his five senses technique, dreams, and other abilities will become skills. Of course, he can still use his tennis techniques.
Yukimura will eventually return to the Prince of Tennis universe.
Theme: A useful skill can often bring people a great deal.