That's a kiss

I'm the purple-haired boy.

It's tagged as "yuri" though.

They have no proof.

You can't see it in this shot, but the black-haired one has two right feet. And the other has really ugly ones.

You know my rage buttons quite well...

Girl on the left is smaller. Kind of like loli Shana versus amazon Shunya woman.

Reminds me of the manga MAKA MAKA.