Hello World
Manga
Hello World is a 2019 Japanese animated science fiction romantic drama film directed by Tomohiko Itō from an original screenplay written by Mado Nozaki. Produced by Graphinica and distributed by Toho, the film is set in a futuristic Kyoto where a high school student named Naomi Katagaki encounters a person claiming to be himself, who time-traveled from 10 years in the future to save a classmate named Ruri Ichigyō.
Description from Wikipedia, available under CC BY-SA 4.0. May be shortened.