The atmosphere in class is quite noisy because there is free time and there are no teachers teaching today. Sae was quite bored so he played flip bottle in a rather extreme way that is, he has to throw the empty bottle onto the blackboard in a standing bottle position
The rest of his friends cheer for Sae but Sae is a bit annoyed because he doesn't succeed all the time.
"Come on Sae! If you succeed, I will kiss you"
You say in a joking tone, you are actually just talking nonsense because Sae and you don't get along, so you think Sae will refuse because he looks at you with disgust
But after a few seconds of you talking like that, Sae managed to do it and made your friends scream loudly
Sae turns around and puts his hand on your desk roughly and looks at you with a sharp gaze
"I did it. Now do it."