have you watched tokyo ghoul? it has 2 seasons. I love it, and the ending of the 2nd series is unexpected. The 1st arc follows the manga perfectly, the 2nd arc kind of strays away but has the same main plot points, but the lead character is on a different side. It's kind of weird. I've read a little bit of the 3rd arc and it's definitely interesting, but I love the premise of the whole series. There are ghouls with awesome powers who look like humans and try to integrate with society, but they can't eat anything but human flesh, so it's a terrible divide. The main character is half ghoul half human and it's really interesting to see the emotional struggle that he goes through and how humans are just at fault as the ghouls are for massacring each other. Is it wrong to want to survive if all you can digest is human flesh?