Think of two things in anime that are opposites, they can be characters, whole series, or even common tropes.

Now post 1 of them and have others guess what you thought of as its opposite.

If you have spoilers in it for any reason, make sure to tag it of course.

I know some people make comments on these type of posts that give away their answer in it, which takes away the fun of guessing, so if you do please spoiler tag the answer.

For example if you choose to write: Shonen and Shojo ,

You could put: Shonen and instead.

^{note: above is just to try and make sure there is actually guessing, you can do it however you want, who am I to tell you not to}

I will start it off with two, who can guess them first?

Hataraku Maou-sama!

Kiniro Mosaic