Maybe this is just me reading into this too much, but a lot of the art feels really... inconsistent. Like either traced or heavily referenced without an understanding of the underlying structures of drawing a human.

Like, they did a couple of shots of the guys' face from below his chin/jaw, and they just look awwwwful, because when you draw those, you really need to depend more on shading/shadows to get accross depth and volumn over just black lines. Along with the faces being pretty inconsistent?

Base +7

hoohttp://www.dlsite.com/bl/work/=/product_id/RJ01039899.html
hoohttp://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_265886/

Base +22, minnazzo +14, ghighina +6

hoohttps://www.pixiv.net/artworks/106494652

Base +65, minnazzo +14