Classmate, Do You Want to Be a Magical Girl?

In the spring of his eighteenth year, Lin Lin suddenly awakened to the "Magical Girl Contract System". His mission is to contract with those lovely girls and help them become magical girls to fight against the alien beasts that destroy the world. Target detection in progress Detection completed [The results show that the target perfectly matches the contract conditions, please contract quickly] "No, buddy, she is my class teacher!"