Regarding Nagisa's Age (Patreon)

Please do not ignore this post, this truly troubles me T . T

Lately a concerned patron, very kindly (and I mean it it was kind and appreciate the concern, this post has not the intention of being an attack to anyone)  brought to my attention that the Re-Traning classroom manga was getting too mature for a character of Nagisa's age. 

Of course since the beginning that was one of my concerns, that's why the manga has an Adult version of Nagisa (and all minor characters), and is not set on the anime/Manga's word, but an alternative version where the adult versions fo the characters attend to some sort of school, and Koro-sensei is alive. 

Also for the sake of making the characters as recognizable as possible I used  the appearances they had on the show as kids as a base for their adult versions, instead of the versions  presented on the series on the epilogue.

Also that's why all the posts come with a legend on the description that  states that the manga has adult versions of the character.

And I kinda  tough that all was was obvious. But just to make it clear : There are no minors involved in any +18  activity on that work or any of my works.

That being said the fact that someone came up with the comment  made me wonder if my depiction of Nagisa does not achieve the desired goal of showing him as an adult. 

So the question is : 

Do you think that my depiction of Nagisa makes him look like a minor?

Also I digged about it and it seems that there was some sort of translation issue with the anime cuz there is  English info that states that Nagisa is 10 years, but he is 14 on Spanish version (the one I watched ) and it makes waay more sense for him to be around that last ge cuz he's just not drawn as a 10 year old ...but then again, anime is has never been the best depicting character's age. But does anyone knows this info from a reliable sorce ?