Under the black tissue paper, you discover a pair of pink panties. You shake your head, thinking that the person must have sent them to you as a joke, and put them back in the box, intending not to wear them.
As you sit down to watch some TV, you notice the time: it's 7:30. You remember the note that came with the panties, and decide "What the heck. Might as well wear them and go, just to see what's going on."
You get up, walk over to the box, and pull out the panties. As you slip them onto first one leg, then the other. . .