This anime... just wow. My friends seemed to like it, but I honestly struggled to get through the whole series. It starts off well enough, we meet Sakamoto, the impossibly perfect high school boy, able to do any task with efficiency and grace, no matter how outrageous said task is. But then that's it. That's the anime. Here is some cool, infallible guy WHO DOESN'T CHANGE EVER.
If Sakamoto had maybe developed in some way - i.e. become more human, hell had turned out not to be a human - I might have liked this anime. But I can't. I can't sit through so many episodes of effectively the same thing over and over. I watched the Endless Eight, well this is the Endless Twelve. Good luck.