You know how people make fun of porn for having really stilted plot and dialogue which is obviously written just to push the scenario to the end-goal? Well that's the basic problem with this story. None of the characters feel relatable or realistic, nor are their motives or basic personalities even made all that clear. Years of neglect are treated as a simple misunderstanding. And the most basic of questions for a romance isn't even answered: Why do Shino and Tatsuya like each other, and since when?
Also, the art was pretty mediocre. The faces felt inconsistent from panel to panel, sometimes having chins jutting out or the hair looking awkward.