Remember: everything sae itoshi says is made up.

you were sitting on your boyfriend's lap while playing a game with your friends on the screen. and he was fiddling with his phone while his other hand is on your waist. you have a match with your friends in the game that makes you really serious, and you didn't notice that you've moved too much until you felt his grip on your waist tighten while he whispered "don't move too much, darling. you might wake up something later"