Reborn at the Age of 18, Asking the Richest Father to Collect the Debt

My name is Shen Yu. He died on a rainy night at the age of 70 and returned to 18 years old when he opened his eyes. In my previous life, I was hidden by the richest man for 18 years - I am not a daughter, I am the medicine to extend the life of my eldest brother. After being reborn, I knocked on his door with a smile, and he burst into tears: "Yuyu, dad has been waiting for you for 18 years!" I leaned close to his ear: "Dad, in your last life you knelt in front of my grave and said you would be my dog in your next life. Now I'm here to take care of you - do you think I'm here to recognize my father, or to take care of my dog?"