I Offered Her to Go to Tsinghua University, but Who Would Have Thought That She Would Pursue Me Instead?

This is the story of a man who encounters a gentle little cat several years younger than him after being broken up in love. In the story, the heroine is gentle and quiet, while the hero is hard-spoken and soft-hearted, seemingly indifferent, but once the heroine is hurt, he will become super protective of his wife and fierce. The two are brother and sister, and the heroine is a student supported by the hero, but fate dictates that the two fall in love across age barriers and prejudices.