pls help me find this bl manhwa

the ml was rich and he stumble this poor kid (this is the flashback and only part I can remember) which is wanted to be close with him and even calling him hyung even tho they don't know each other. So he sneakly let this kid in their house without their parents knowing and made them its playmate. He never stop calling him hyung because he said he never get treated like that before and got even wore fancy clothes. pls help me find this manhwa I can't even sleep thinking abt it and js makin me cry.