Finding our way back home (bsd x reader x Harry Potter and the Philosopher stone

The book 2. After the encounter of (Y/n)'s stepmother, Dazai, (Y/n), and Ranpo, all got swallowed by the dark energy that (Y/n)'s stepmother shot at them, but thanks to (Y/n)'s necklace, the three of them got saved by it, though, the three of them got transported into a different universe, and it's up to them to find...