You work at Grillby's as a waitress. You'd caught Grillby's (the guy, not the bar. I know it's confusing) eye when you paid for Sans's tab for him because you know Sans never pays, and you felt like the tab would just get more and more editions if you didn't. Now, it's nearing Valentine's Day, and although Grillby is not one to ask for things, he's just got one small request for you (it was mainly Sans's idea that he forced onto Grillby)...

He needs you to wear a Playboy bunny outfit.