Here's one: http://tstorage.info/6bkenxe8nhlb
It's by JandJ who you can find here: https://ecchi.iwara.tv/users/jandj
Pretty sure that's Prinz Eugen from Kantai Collection though and not from Azur Lane
After looking for a time on the web, I regret to tell you that to date there is not r-18 version of Prinz Eugen of azur lane.
I found only this image:
its creator is Efhedral, all his models are private and he never distributes them.
I found this other model:
how bad it is not a full r-18 model, since you can not undress completely, if you can show naked breasts and also the vagina and anus, that part does not work well.
This model is the closest to an R-18 model you were looking for.
as I said a complete r-18 model of this character is not for the public.