Breaking the Barrier: The Sequel to a Gravity Falls/ Undertale Fanfiction
"Don't worry, Sans... I'll never forget you..." Mabel and Dipper Pines are not your average twins. After arriving in Gravity Falls for the summer, they found themselves in a world of danger, that could soon be ending. Bill, an inter-dimensional being, had taken over the little town, and soon, the whole world. It seems...