The 4gewe3g6edge CEO is going to be late for class Dating Service.

Megan Grassell founded her teen-targeted underwear company, Yellowberry, at 17 and now, as a high-school senior, she is trying to juggle a very full schedule of classes, extracurricular activities, and running a burgeoning business. "To say it's taking over my life is a very small way to put it," Grassell laughed during an interview with Fortune. "But I love it."

It was during a trip to the mall with Mary Margaret, her younger sister, that inspiration struck: "I was shopping for bras at the mall with my mom and little sister, and we went to a bunch of different stores looking for a good first bra for Mary Margaret, but there was nothing. There were jogging bras or these very sexual padded, push-up bras. I kept wondering, where is the cute little bra in fun colors? I realized that it just didn't exist. About a week later it hit me: If no one else is going to do it, I'm going to do it. I'm going to make bras for girls Speed Dating."

To fund her startup, Grassell raided her savings: "I worked every summer since sixth or seventh grade. First pumping gas and then I bussed tables and waitressed at a place called Nora's, which is a fantastic restaurant. I saved all of that and used it to get my product to the prototyping phase."