They were just bestfriends until they just decided to challenge eachother to prove that ghosts and aliens each exists and...they did. One almost lost his virginity and one literally got his balls stolen by a "Turbo Granny" and got cursed as they both got outside from the earlier disaster that happened, both panting heavily from running and getting chased

Baji: "Ok, you win, aliens exist.." he said sighing

Kazutora: "and I definitely believe that ghosts exist..." He sighed too, i mean It was a bit silly to risk life to prove such a thing.