This One Isn't a Supporting Female Character

When Xu Zhiyi learns that she has become a rich supporting female character, she is pretty happy about it.

Until

A thing called the System tells her: [You're the supporting female character. You have to be uglier, stupider, more useless, and poorer than the heroine.]

And so Xu Zhiyi begins her miserable journey of pretending to be ugly, dumbing herself down, and squandering her money...

But

Supporting character Xu Zhiyi: Boo-hoo, I'm just naturally so beautiful I can't help it, so brilliant and clever, and so popular and rich~~ Boo-hoo, this is so hard for me~ Sweet heroine, comfort me. Give me a hug and let me bury my face in your chest~~

Heroine Ai Qingrou: Hands! Keep them, off, me...

Supporting character Xu Zhiyi: I'm not doing anything out of order. I'm following the proper sequence...

Theme: No one is born a supporting character. As long as we work hard, we can all be the protagonists of our own lives.