Happy-Go-Lucky Days

is a Japanese manga series by Takako Shimura. It was serialized in Ohta Publishing's manga magazine Manga Erotics F from 2002 to 2004. It was collected in two tankōbon volumes. An anime film adaptation by Liden Films Kyoto Studio was originally scheduled to premiere on May 8, 2020, but has been delayed due to the 2019–20 coronavirus pandemic.

Plot
Told in a series of vignettes, Happy-Go-Lucky Days focuses on short stories of everyday life and love - such as a person attending an ex-lover's wedding, a student developing a crush on a teacher, or childhood friends reuniting as adults and and discovering how much they've each changed.
 * From Crunchyroll

Official

 * Official anime film website (in Japanese)

Other Sources

 * Manga
 * Anime
 * Anime
 * Anime