River

River is a 2023 Japanese comedy film directed by Junta Yamaguchi, written by Makoto Ueda, and starring Riko Fujitani. It was produced by Europe Kikaku. The film shares much of the same cast as Ueda and Yamaguchi's 2020 film Beyond the Infinite Two Minutes, which also involves a time-travel plot.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.