What Should I Do If My Junior Brother Turns into a Bad Old Man?

I have a junior brother. He ran away from the mountains at the age of fifteen and did not come back for a hundred and eighty years. Although people who practice Taoism live a long life, I thought I would never see him again. Unexpectedly, he came back recently. And... He also turned into a bad old man. Junior brother version copy: I had a crush on my senior brother for a long time, and knowing that he would never respond, I ran away. Until now, when I am very old, I have never thought about seeing my senior brother again for the last time. Unexpectedly, in order to help me, he not only got the most precious Nanming Pearl in the world, but also captured a dragon. It turns out... My senior brother is a big shot? Brother with a tender face and a cruel heart, a thousand-year-old monster, attacks x. Although he looks older, he is always younger than his younger brother. Purpose: To call for sincere emotions and explore the philosophy of life.