Linting's Inequality

I spent my entire youth looking up to Lu Zhiyuan, thinking that he was the most silent mountain in my world. It wasn't until ten years later that I opened the wooden box he left behind, only to find that I was living in the fortress he had built with sacrifice, but knew nothing about it. He loved me devoutly throughout his youth, and I was an inequality that he could not solve even with all his rationality.