Reborn: The Perfect Girl Training System

[Slice of life + romance + transformation (gradual) + showbiz (later on)]

After a car accident, Yan Xichen was reborn ten years in the past. He originally thought he could follow the path of his previous life and make up for the regrets he had once carried.

But to his surprise, he acquired the [Perfect Girl Development System].

From the moment he got the System, everything began to change.

With the System's help, Yan Xichen gradually transformed into the perfect girl. As he made up for his regrets, his future also set off down a path he had never dared to imagine.

P.S. The blurb doesn't do the story justice, so please read the novel. He cross-dresses in the early part and transforms later on. This is a gender-bending romance, and it may head in an entertainment-industry direction later (not certain).