Her father died and her mother died in love. She suffered all the hardships of human kindness and longed to become a master. In order to seek fame, he went to school and was his classmate for three years. He taught her how to ride and shoot, and she taught him how to get along. But once they fell out, why on earth did he angrily accuse her of not being worthy of being a friend? When they met again on the battlefield and they didn't recognize each other, and she died, what was the reason why he regretted it in the first place?