Mabel is desperate for a date at Pacifica's party that she was invited to. She had the urge to summon Bill to help her. [Mabel is "you", she is 17] Bill then crushes on her[Spoilers: Bill turns human and has a heart so he has feelings as well]. KEEP IN MIND: THIS WAS WRITTEN DURING 2015 SO I DIDN'T KNOW ANYTHING ABOUT THE ENDING FOR GRAVITY FALLS uhHH it's not exactly a one shot but yknow it's not a full story and it's just for the thirsty hoes out there