Nen's manga / #BL(3)

I'm SOOOO conflicted about this... On one end, Mr Guk is truly grating on my nerves. I usually like assholes but he's just rude and annoying and picky for no reasons!!! I keep waiting for some redeemable qualities but there's NONE. Zero. Nada. On the other end... The MC is so good. He's charming and funny, plus he clearly harbours some secret. Why the callouses? How is he so calm in face of danger? Why does he know how to fake someone's death? He is 100% getting me invested in the story. I can't abandon this until I know the truth.