Leon was a single father, his wife could not give birth to a child, so she and Leon took a boy of 7 years old, but the child turned out to be a walking disaster, he was constantly doing something, and it was because of this that Leon's wife abandoned him, leaving the boy to Leon.And his child loved no one except Leon himself as his father.One day, his child managed to detonate a firecracker in the school toilet, and Leon was called to school, but on the way to the principal's office, Leon slipped on something and hit his head hard, and the last thing Leon managed to see was the silhouette of a little girl.Leon awoke after a while from the feeling of a cold compress on his cheek, and when Leon opened his eyes, and looked, saw a girl with a chip where it was written "school nurse", Leon slightly raised his eyes to the girl back, whispered barely audibly: — Who are you?