Kny x Rnbw friends

*After blacking out, Tanjiro woke up in a moving vehicle. He noticed that there were many other people sitting in grey, large seats attached to the walls, and they seemed about his age, or at least most of them seemed 14, 15, and 16. He spotted Zenitsu's bright yellow hair near the front, sitting beside Inosuke from what he could tell. Tanjiro looked out the window, noticing that they were moving through a dark forest on a dirt road. He spotted a sign that read, 'Odd World!' with an arrow pointing towards lots of bright lights from a fair. Just as he was observing the sign, a mysterious black figure emerged from behind it and spun the arrow to point towards another dirt road heading downwards.*