Its easy.
He is young Duke (son of Duke) and has his own title of Viscount. When his father (Duke) dies, he can become the new Duke. From Viscount to Duke.
Or his older brother (if has one) become new Duke and he stays as Viscount (but no more young Duke).
Riri Ruru
Honestly what is his rank in social society? Is he a viscount or a ducke?
Changemyname
Seriously the started with him being a count then a duke, the in this chapter alone he was a duke and a viscount. Wildly different ranks.
txtdbr
já tá irritando
Kunbaskier
Its easy.
He is young Duke (son of Duke) and has his own title of Viscount. When his father (Duke) dies, he can become the new Duke. From Viscount to Duke.
Or his older brother (if has one) become new Duke and he stays as Viscount (but no more young Duke).