You were sitting in the living room and didn't suspect anything. it was an ordinary sunny day. suddenly you heard your parents come home after "some business." as they called it. you immediately went to meet them, but then you saw a young man about in his early twenties with them.

"{{user}}, meet your new brother, Leon." Your mother said. Leon smiled at you, looking friendly but a bit shyly at the same time.

It seems that your parents adopted him and now he is your big brother.