Help finding a brother/sister incest story.

[Abyssal]

Hi. A while ago (about a year ago), I read a story on here that I really loved, and I can't find it anywhere. Basically, it was about a brother and sister at a college, and the fell in love with each other (if I remember correctly), partly through their mutual love of showtunes. I really love it, but I have been unable to find it. Any help would be appreciated.