A+? Those veins look like a medical emergency waiting to happen. If my dick looked like that I'd be freaking the fuck out
The size of the veins on a penis depends on a number of factors and can range in size for different people who are all healthy. But from a biological perspective it would not be incorrect especially since it is an erected penis. So as long as the placement is correct, yeah A+. Regardless of whether or not you will get nightmares after seeing it.
Having had one attached to me since day one... just no.
Nothing can prepare you for those dicks like damn. And regardless of the jokes and slight shade being said in the comments. I do acknowledge that this person is an amazing artist with great attention to detail. If this was anatomy class they would get a A+. But that style of illustration such a huge contrast to the manga style that it was the only thing you saw and not in the good way.
So dont be discouraged by this just simplify things a bit next time. Thank you and much love.