I Left All the Troublesome Matters to My Sister, Who Is Called Incompetent, and for Some Reason She Got Sick. Moreover, She Seems So Much More Competent

There is a girl in my house called Incompetent. She is the girl who suddenly came to live in our house as soon as I turned eight years old. Father suddenly said, “From today on, she’s your younger sister. Be careful in public. At the time I didn’t understand what he meant by “just a younger sister” and I didn’t understand what he meant by “be careful in public,” but somehow I understood that it was okay to treat her roughly, even if I didn’t understand what he meant by that, just by looking at the way the adults were treating her. I didn’t know what it meant to be “nice,” but I knew from the way the adults treated the girl that it was OK to be nice to her, even if I didn’t know what it m...