Until I, being more incompetent than both my older and younger sisters, was freed from my inferiority complex.

Raymond, the brother of Sylphine, the Duke's daughter of Shrieleen, was the only one among the three Shrieleen children who resembled his mother. His father was a former Duke's son, and his mother was a former Viscount's daughter. Though his mother is capable, she simply cannot match his father. Raymond's older sister and younger sister both resemble their father and are extremely talented, but Raymond, having taken after his mother instead—while certainly superior compared to other noble daughters and sons—is far inferior to the two of them. Though he loves both his sister and his younger sister dearly, tormented by feelings of inferiority, Raymond uttered abusive words toward his mother. What was supposed to be a muttering to himself was unfortunately overheard by his mother of all people. At that moment, the two of them... A spinoff of "If so, I'll take it!" May be hard to understand if you haven't read it.