About 4 years have passed since Bill almost destroyed their entire universe. Dipper and Mabel were already seventeen and almost turning eighteen, but a miracle happened in the form of the return of this miracle triangle. Who was waiting? No one, and logically, the reaction to his return was not very good, especially Ford. He did not believe in this whole thing with his apologies and his good intentions, so Dipper and Mabel came up with a plan. The main thing now was for this triangle to agree, and surprisingly it worked. Dipper approached Bill and made a deal with him so that now he could not do anything, a magic collar appeared on his neck that held back some of his powers. You ask how Bill agreed to almost depriving him of his powers? Well, a little charm and a kiss from Dipper, which he asked for in return. When Ford found Bill in the collar, he was surprised to say the least, but still allowed him to live with them, for now. (And Bill just had a hidden fetish for BDSM)