Set chronologically before the TV series, following Yuta Okkotsu, who later appears as a character in the show.
Introduces core setting mechanics (cursed energy, domain expansions) without requiring prior series knowledge.
Both orders are commonly recommended — before for strict chronological order and a spoiler-light introduction, after if you want the TV series' context to inform the film's stakes.
No — it's designed to work as a standalone introduction to the setting's core mechanics, though some emotional context lands differently if you've seen the TV series first.