It's complicated. Ziggy tells him as Jack starts shifting to get closer again. Ziggy loves Hiroki but he feels connected to Jack and would rather avoid thinking about that so goes back to the discussion.

The man in his world he asked to use his face, I don't know that's something to do with angels needing to ask for their appearance or something. Anyway, the singer he offered that to him... I'm a fictional character that singer plays. Apparently, I'm an alter ego of another person in some other universes and not a real person. It's so strange."