I Heard That the Demon Lord Also Shed Tears Like Rain

[Two male protagonists, 1v1, HE, hard-tongued and soft-hearted, stone spirit × not beautiful, strong but miserable demon] [Also known as: After waking up, the fool in his memory became a demon king who was feared in the world of cultivation. Shi Lang is a stone that has lived for thousands of years, so boring that it is about to weather. Until he was bored and chose a young man to watch a movie to relieve his boredom. He watched the boy go from pure kindness to madness step by step, and at first he thought he was just a spectator. Until—— On the night when Confucius and Mencius killed their master and massacred all their disciples and rebelled against the Xuanzhen Sect, it rained heavily on Diezhang Peak for three days and nights. He chopped off the head of the Yuanying monk with one knife and crushed his senior sister's golden elixir. But in a short span of a hundred years, he stepped on the bones of thousands of monks and stepped into the position of Demon Lord, becoming an existence that could make children cry at night. "That man is a demon who deceives his teachers and destroys his ancestors, and has no humanity." Rumors in the world say that he is an obsessive genius and a ruthless lunatic. Only Shi Lang had seen him shed tears, and remembered the young man's eyes as red as a young rabbit in those days, and the vague voice in his throat: "Sister."