His lungs can still recover over time but if the og body was such a heavy smoker it might be difficult, but either way I think it could be cured by a healer type hunter (if there is one).
I'm Everywhere.
BL Reincarnation: https://mangabuddy.com/manga-list/105170
BL Reincarnation: https://mangabuddy.com/manga-list/105170

