There's a drastic difference between the anime and manga. Like... They're different two different series. Almost. Second season especially. I took my boy from the manga. I thought it was hard to get into the manga...I tried...and then I watched the anime, AND THEN, I was able. So if there's any trouble with the manga, try the anime. (Talking from experience.)
OF COURSE...it took me an entire year to actually GET INTO Kuro. I'm weird like that. And slow. Orz.