Is This a Parenting Story?

“Hey, do you happen to know what a 'raising-a-child' story is?” To Miella's kind question, Isthin retorted gruffly. “What’s that?” “It’s a novel genre where a young child is the main character, and people around them raise the child.” “Hmm. Never heard of it.” “To put it simply, it’s just like you and me. This older sister is raising you well, right?” “……” In fact, he had a secret he was hiding from Miella. That he was actually 12 years old, not 7. And that he wasn't just anyone, but the sole heir to the Valuar ducal family. ‘When should I tell her that I’m not her younger brother, but her older brother….’ Soon, Isthin thought. That idiot, I can’t let anyone take her. I have to p...