Save the World Starting from a Contracted Magical Girl

As an ordinary high school senior, Lin Ming's life was undoubtedly monotonous and boring. He has bad interpersonal relationships and his grades are always in the middle or lower reaches. He has been thinking: It would be great if the world could usher in huge changes, whether it was a strange invasion or the arrival of monsters on the earth, anything would be great. One day, his dream came true. When a monster that was two buildings tall appeared in front of him, a beautiful girl with flames all over her body and red ribbons flying appeared in front of her. "Please feel free to leave it to me!" She vowed. In the blink of an eye, he looked like he was on the verge of death. "Contract me." Her weak voice woke up Lin Ming. From then on, there was a beautiful red-haired girl beside Lin Ming.