Seeking some help to finish of a piece

[Anchimayen]

Hi, i've been away from this forum for quite a while (hadn't have really much time to draw), but haven't forgotten about the professionalism here. So i have this realistic drawing of one of my all time favorite anime characters Kaneki. But it seems like it's a bit off though, i believe it has something to do with the hair and the face.

[UPDATE]
Have found some tips on a different forum and have updated the picture