Original title (JP): 劇場版 チェンソーマン レゼ篇 (Gekijō-ban chensōman reze-hen, Chainsaw Man: Reze Chapter)

Denji became “Chainsaw Man”, a boy with a devil’s heart, and is now part of Special Division 4’s devil hunters. After a date with Makima, the woman of his dreams, Denji takes shelter from the rain. There he meets Reze, a girl who works in a café.

https://www.themoviedb.org/movie/1218925