What did you draw on your Math Test!?!?!?!

My son had extra time after his Math test last week. He should of reviewed his questions as he did get 2 wrong, but still 89%. We reviewed his missed answers so he know what he did wrong.

But this isn't why I am writing about his math test, it was what he did while waiting for everyone else to finish. He has been watching an Anime recently and has taken a strong liking to it. From his drawing below, can you guess the Anime?

For even more fun, can you tell me the characters he drew as well from the Anime?

I will update this later with the answers :)