Dragon Contract Ring

He was a poor student who was admitted to a key prestigious school as a commoner, and his grades were always among the best. But, because of her, her accident, and her death, he lost his enterprising spirit, and a bright star fell from then on. On the day of farewell, he went to see her for the last time and found a ring in her hand that no one could open. Since then, the boy's life has started a new journey, and where is she?