When Kamui is able to break the boundaries of parallel worlds, Obito begins his journey and gains countless spoilers
Regarding the question of CP: The CP of each world is naturally different. In most worlds, there are cassettes. In a few worlds, there are Dai Lin, Dai Madai, Dai Ming, Dai Di, and Zhu Dai... Although the author climbed the wall with Madara, it is undeniable that Tapi is the mainstream of Naruto's BL, and Dai Lin is the mainstream of BG. Of course, I selfishly hired Madara to be the CP for Obito, but he will probably show up later.
Concept: Different worlds, one dream