Puella Magi Madoka Magica: Changing the Protagonist

A trope, a trope, a trope!!! Important things have to be said three times.

Fan fiction. Little Nian becomes a magical girl in her dreams, then makes a contract with Kyubey, who is hiding in the city of Nanchu.

My writing isn't great, and there's a romantic pairing. The five colors: Su Nian, Song Xiaonan, Huang Chuqi, Wu Yexue, Hu Jiao.