Woah, what's up with the lack of comments?!

You have a great way with line weight. I feel like some parts of where your lines end is a bit awkward but maybe that's because I don't do line art well enough to have a qualified opinion. But I like how different your take on his face is! Everyone defaults to his usual look but you added in some wily-ness in there.

Very nice!

Haha, it's just that I've hardly ever get noticed *sob*

Well, it does look awkward.
It shouldn't matter if you're good at line art or not, everyone should just shout out their opinion without being modest, that way we can help each other improve (sorry, my English is really bad, I hope it doesn't sound confusing)

Anyway,I should fix that. Your comment really encourages me, thanks!

Okay. the Collar edge on the right of the picture ends awkwardly. I would have made the line heavier/thicker to show it was in front of his neck.

Some of Zero's lines should be heavier to show she's in front of Yohei. Right now because of the lighting on both characters it looks a bit too flat. Her hair is where this is most notable. Maybe try a thicker outline only?

I think the main thing here is that there's very little contrast between them there is usually present in the anime. One more dark shading tone just for Zero's coat and Yohei's cloak would make things pop more.

That's just what my eyes are telling me. I am sorry if this is too much or hard to understand.

I see what you mean. thank you!

They´re looking great