Graduated from College, the Strongest Magical Girl in the Graduating Class

After graduating from college, Lin Yan was preparing to become a trainee teacher when he received the news: his sister, a magical girl, had disappeared. When he went to the association to inquire about information, a weirdo appeared, and the magical girl who came to fight the weirdo was also in crisis. At the critical moment of life and death, he signed a contract with someone who called himself "Magical Girl System", obtained the soul gem, and transformed into a new magical girl. After he kicked the weirdo to death and left in style, there was a legend about a mysterious magical girl codenamed [Brilliant Yang] in Haicheng: It is said that the magical girl codenamed Xuan Yang can stop the terror of little weirdos crying at night. As for the magical girl herself, she lives a life of teaching and educating people during the day and dealing with weirdos after school. Lin Yan during the day: Yes, it's you, come up and solve this big math problem. Lin Yan after get off work: Since you have inherited your sister's career, how can you stand still? Go to hell with all the weirdos who take up my off-duty time! After he went through all the hardships and finally faced the task of causing his sister to disappear—— A corner of a larger conspiracy against him also emerged.