If you have a sensitivity to these topics, go to a less sexual fanfic.
If not, please enjoy.
Neko Luigi
One day in the Mario brothers house , Luigi was sitting on the red couch with green pillows. Watching cat videos on his IPhone.
"Geez it seems like being a cat is more fun and exciting." Luigi thought. "Sometimes I wish I were a cat." Luigi murmured under his breath. Luigi paused the video he was currently watching and checked the time. "Mama mia! It's 12:00 am. I need to get to bed." Luigi spoke, putting his cute green nightcap on.
Seeing his brother in Mario, in his king sized bed. Gazing at Mario being fast asleep, Luigi followed in his brother's footsteps and got in his own bed where he fell fast asleep.
Next morning…
Luigi wakes up, feeling refreshed. Going to the mirror to do his morning routine. "EEEEEEEEEEEEEEYAAAAAAAAAAAAAAAAAAAAAAAAAAAA!" Luigi wailed. Mario, hearing his little brother's scream while making pancakes, ran as fast as he could to the big bathroom they shared.
"What's wrong Luigi, I heard you scream.
Then seeing his brother's 'problem' Mario's jaw drops.
"Mario...I'M A CAT!
End of Chapter 1