Why do the best mangas

Have the most boring, most unappetizing covers?
This was freaking amazing. Storytelling, character development, plot twist. The emotional level of the characters are psychologically on a another level. This story was on a level fit for long time romance/yaoi/fantasy readers looking for advanced plot. You can tell there's no bullshit since it's COMPLETED which means the author was aiming for quality content. I will buy this on lezhin. I've been skipping this manga for months since the cover and the first 2 chapters were deceptively random.. but man. This was the best thing I've seen this 2018.. and i just toured Japan.. lol