Reborn in Another Body from the Start, and the System Wants Me to Be a Lackey?

This is a crossover world where JoJo, Demon Slayer, Naruto, and other series will appear. Every time Li Fei completes a mission or defeats a creature, he gains a higher fusion rate with a template. This is the story of Li Fei helping his big brother reach the pinnacle of the world. No heroines are given away, and he is decisive and ruthless. The story will unfold naturally instead of simply telling us that Li Fei is invincible.

Li Fei: "This is great. Big Brother is stronger again. I'm so pleased to be standing at the summit."

Long Du: "My little brother is so awesome. How am I supposed to hold my head up as his big brother?"

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.