At the Beginning of Soul Transmutation, the System Requires Me to Be the Younger Brother?

This is a comic book world. Jojo, Demon Slayer, Naruto, etc. Will all appear. Every time you complete a task or defeat a creature, you will gain the fusion degree of the template. This will be the story of Li Fei leading his eldest brother to the top of the world without giving away his daughter. He will kill decisively. The plot will unfold and will not directly tell the story of Li Fei's invincibility. Li Fei: "It's great. Big brother has become stronger again. I'm very happy to be at the top." Long Du: "My little brother is so awesome, how can I, the big brother, be embarrassed?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.