The Strongest Magical Girl Doesn't Want to Retire

Magical Girls of Light are special girls who form a contract with the Fairy of Light between the ages of 12 and 18 and gain magical power. However, when they turn eighteen, as the contracted elves leave, they will lose the power of magical girls. Su Huaixi, known as the most powerful magical girl, did not want to retire. Before her eighteenth birthday, she broke into the Demon King's City, forcibly captured the Demon King, and signed a contract with her on behalf of the contract elf. … Hua Diazhu, who died in the monster attack, opened her eyes and found that she was reborn as the Demon King. She also inexplicably signed a contract with the strongest magical girl and was forced to enter the world of magical girls.